1. ATMs are really out of the question, but I had some thought over this, and actually paper vouchers are also not possible, as private keys are not available to the plugin.
2. Your request about WC Marketplace fees is here. I will see what I can do.
3. About the airdrop extension, if you are referring to this bug about roles, I was never able to reproduce it, so I cannot fix it. I do have some minor bugs fixed related to this, and I can push these out today, since they are ready.
If you think that there are any other defects (i.e. not feature requests) that I may have missed, please let me know.