alt Hacker NewsSpamhaus does not offer the ability to pay for removal. UCEPROTECT is uniquely evil in insisting on payment. It's a good thing that their lists are not widely used, so, in practice, it doesn't matter if your IPs are listed by them. Their revenue comes from unwitting victims who don't know any better.
Their lists are definitely used, which is the only way I knew about them - some years ago one major email provider was not receiving email from my DO hosted site at all, completely blackholed. I knew enough of what I was doing to know this was practically impossible, spent over a week running every kind of configuration scan and test I could think of, and finally narrowed it down to this organization in particular blacklisting all of DO IP space. Needless to say I was shocked and annoyed at such an unprofessional looking and sounding website wielding such control over the operation of my site (which, lest it needs to be said, was a completely legitimate site).