Letely, the price is going up but many of those offers may have been made a day ago or something.

Also, some people may be willing to take a little haircut to get the trade done fast. This is how price discovery works on an order book, spreads should get smaller as liquidity goes up

But with dandelion++ it should be infeasible to deduce anything about a transaction on receipt, no?

Just use obtainium and begin to move away from app stores. Any git repository on any server (doesn’t have to be github, could be a gitlab, gitea or forgejo server) that does compiled APK releases for your hardware can be used as a source repo with obtainium, no need for all the overhead any of the app stores require.