I have only ever read about 20 subs on Reddit and I've never had an account there. I use Teddit to read them for stuff that hasn't made it to Lemmy yet.
just so we're all clear on one thing, generally frontends still contribute to traffic of the main platform. it's most likely that using these frontends is still contributing to reddit's traffic, even if you're not giving them any semblance of ad revenue.
if you're doing this because you don't want to contribute to the data-mine and don't want to give them ad money, this is a good tool. if you're doing this because you don't want to support reddit, there's a good chance you've been misguided there-- you'll still contribute to the numbers they show investors at the end of the year.