Dear Simon-Jan & all, Thank you for the ongoing discussion and for encouraging concrete feedback on how the models behave in practice. Looking at both proposed models, one common structural characteristic stands out: fees increase approximately linearly by category, while the amount of address space represented by each category increases exponentially. This creates a sharp divergence between resource growth and fee growth as categories increase. A possible way to address this would be to make the fee progression itself explicitly non-linear, positioned between linear and exponential growth. Concretely, instead of a roughly linear increase per category, the fee could follow a curve such as: Fee(k) = F0*2^(ak) (0<a<1) where k is the category index. For illustration only, values of a around 0.5–0.6 produce a curve where fees grow faster than linear, but significantly slower than the underlying resource size. In practical terms, this means that moving up one category would still result in a clearly higher fee, but not one that mirrors the exponential increase in address space. This appears to better balance equity, reduce incentives for fragmentation, and avoid concentrating a disproportionate share of total income on a small number of very large members. Separately, in the category-based approach, the Category 0 appears to group members with very small IPv4 holdings together with members holding no IPv6 /32 at all. This seems difficult to reconcile with RIPE NCC’s long-standing policy objective of encouraging IPv6 deployment, and may be worth revisiting when refining the category definitions. I hope this more concrete example is useful when evaluating refinements to the charging scheme. Kind regards, Chenyang Gao On Dec 16, 2025, at 7:38 AM, Simon-Jan Haytink <simonjh@ripe.net> wrote: Dear all, Thanks for the early feedback on the two draft models, both on the list and in reply to my original mail. This is exactly what we hoped for - discussion on the pros and cons of the two models and guidance on where the fees in each should be set. I will try to address some of the issues raised so far. First, it’s important to note that the two models were created with our interpretation of the principles of the Charging Scheme Task Force in mind. So we aim for greater equity while keeping in mind that all members should contribute to the funding of the association, and we should not be dependent on a small number of members to pay a large portion of the fees. I recommend that you look at the two models with the task force principles in mind and let us know if you think we can better match them. A linear model that charges per IP address is a good example of something that falls outside the principles set by the task force. The full report is available at: https://www.ripe.net/membership/mail/member-and-community-consultations/char... The fees set in the models are always going to be criticised - we have seen criticism from a number of perspectives and from different types of members. That is good, however at this stage it is more important to get input on the boundaries (for Model A) and the formula (for Model B). This is because the fees have the potential to increase or decrease over time according to the RIPE NCC’s funding needs. What we are trying to get input on here is the relative distribution of costs between the membership. Equity as a concept is very hard to measure or be objective about - the previous model was a one-fee-per-LIR Account model, which has equality as a key concept. The models we share now do not focus on equality and have differentiation in fees. How equitable these differentiations are is what we need your input on. And on the point about using Excel-based calculators. We are able to transparently provide a lot of data and information in the spreadsheets that members can use to create different scenarios. Providing all this data and flexibility to calculate scenarios as members wish in a non-Excel application was not something we could do easily given time constraints and internal workload, and the anticipated level of feedback which will require ongoing updates. In the meantime, please keep the feedback and questions coming. It is hugely valuable to get them, and it will help us arrive at a better funding model in the long run. Kind regards, Simon-Jan Haytink Chief Financial Officer RIPE NCC On 15/12/2025 18:58, sdy@a-n-t.ru<mailto:sdy@a-n-t.ru> wrote: Hi, All! As I understand, we keep going in circles. Time after time, we are offered the same and same solutions with different sauces. Those with few resources are forced to pay for those who have too many. Let's do this! Either there will be an option where the payment for IPv4 resources will be strictly linear in the calculation formulas and without any restrictions, or let's LEAVE EVERYTHING AS IT IS. Looking at the socio-economic situation in the EU, in the next 2-3 years, the issue of calculating the amount of the annual payment will not be the most important subject for RIPE NCC at all. Moreover, it is not a fact that the INTERNET will remain the same as we are all used to. The time to change something in the near future is gone, it remains only to observe what is happening. Dmitry Serbulov. Hello everybody Just remember that this is a conversation that we collectively have quite often and it always ends up at least mildly heated. Let's try and be nice to each other and remember that almost everyone here is not trying to be unreasonable! 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