The plugin has been used on my forums for a while now and taken a few payments successfully.
It’s also in use by @Jeremie_Leroy and he has encountered one or two issues which I haven’t yet managed to reproduce on my instances.
I’m only able to work on this project in my spare time and am currently very busy with other things.
I plan to write a proper test suite and would gladly accept pull requests and comments on the code.
The plugin does not support this, no. It sounds like a good feature to offer and I’d accept PRs at this stage.