From what the other app devs said, it isn’t that reddit would turn you off at all, it’s that you’ll start accruing charges as of July 1st. So, hopefully they didn’t just rely on reddit shutting them down or reddit is going to hit them with a nasty bill for a week of use that they’ll have to try to fight.
Doesn’t your mouth taste bad if you just don’t do it regularly? Honestly even general hygiene concerns aside, I’d do it twice a day just to get the fresh feeling. Maybe you could try some different toothpastes to find one that makes you really want to do it and not just feel like it’s something you should do?