We don't proactively search for new services or re-review those listed to make sure the information is still up to date[1].. but we do update the page if we hear about new ot changed services through other channels. So, if you or anyone else are aware of particular services that are notable for their flexibility in payment providers, please let me know and I'll add them to the page.
That said, I would not be surprised if none exist. The more payment processors you support, the harder it is to avoid handling the money directly, which means more legal hurdles (regulations, liability); the simpler alternative (that snowdrift.coop is currently pursuing, for those practical reasons, although it is limiting in some respects) is to coordinate donations though other platforms.
[1]: Aside, I was trying to write this sentence in the form "re-review the information for [up-to-date-ness]", but couldn't think of the right word. "Accuracy" is close, but doesn't capture the element of time. Any ideas?
