Interestingly -- but not unexpectedly -- enough they may add you to the uceprotect-level1 list if they see you attempted a payment but haven't paid. So, for reasons not related to spamming.
The whole autonomous system of my cloud provider got listed in uceprotect-level3. I wanted to check how their whitelisting works. They blacklisted the public IP of my home internet connection, with a reason (https://pasteboard.co/JQShns8.png):Payment attempts with invalid credit cards.
Needless to say: my home ISP doesn't allow sending mail, has port 25 blocked, and I haven't entered any card data to get my IP of Cloud server whitelisted whatsoever, only initiated the payment and closed the browser tab once I was routed to their payment provider.
This indeed puts the uceprotect in a different category in my books. Please forget what I wrote earlier in this chain.
Yours
esa
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Mr Esa Laitinen IM: https://threema.id/2JP4Y33R or https://signal.org/install Skype: reunaesa Mobile: +4178 838 57 77