There’s nothing inherently bad about sugar. It’s just energy. If you intake more energy than you burn it’s getting stored for future use (you get fat). The same goes for almost anything “unhealthy”. Manage your energy intake and almost nothing is unhealthy.
I have a few communities that I lurk in as well and I use a clean RSS feed app to subscribe to sub’s old.reddit RSS feed.
I use the app NetNewsWire on iOS which is free and clean. If you then want to follow technology subreddit you add the feed https://old.reddit.com/r/technology/.rss into the app.
Hope that helps some fellow lurkers out there.