Yo Goethe, just to reinforce what others have said AFAIK it makes no difference which site you use to start your CCBill account.
The system is a bit clunky & dated but it works. Support for the most part is decent, and it's super convenient far as payouts go. CCBill gets a bad rep from some folks here but I think a lot of the criticism is overblown - aside from occasional glitches with the backend admin functions I've had a highly positive experience with them for years.
And if you ever find yourself with some vintage/mature/etc traffic, consider giving
DeltaofVenus.com a try. Humble small-scale program but converts/rebills great with the right traffic.