In the early days of the internet in the US the convenience fee was what the 3rd part sales software charged for online transactions but I think now with the it mostly being first party sales or integrated to the vendors POS it's just a way to charge more money without advertising it on the sticker price.

Not leaving reddit per se, but the hostility to 3rd party apps feels like yet another signal that the user driven community is gone. I'll probably stop using reddit on mobile when I can no longer use rif, and expect my overall engagement to go way down. But I'm not deleting my account or anything.