2 BTC for a human-readable bolt 12 offer generator feature integrated into a popular iOS or android bitcoin wallet. “Human-readable” means something that can be used on feature phone without QR or copy/paste ability. For example, something that looks like LN address.
"Popular" leaves too much room for interpretation imo, they should have defined exactly how many downloads, users, etc. is needed.
I also wonder how easy it is to actually make changes to these wallets. I found Blue pretty easy to propose changes to, but I don't know about the lightning wallet repos. Breez and Phoenix have a decent amount of past contributors but the Muun android repo looks like there are only employees who have been working on it.
#2, #3, #4, #9 (to those who have the expertise), and #10 seem like the best projects to work on for people who are not already integrated into an existing open source community and want to jump in to sponsored Bitcoin development.