But one downside of busy.org is that when you're post promoting your post on discord, no photo is shown, just plain text. Without a photo, I now hardly am having random upvotes from there.

But this doesn't really matter to me, the $ upvote from busy.org can suppress the $ I got from random upvotes from discord. But if you really want to grow your fan base there on discord rather than just $ OR you had lots of random upvotes from there (I usually had 1 or 2 each day), you may switch back to the original stemmit publishing platform, so a photo of a post will normally show up on screen.

EDIT: now do some trials, compare if you can grow more $ from busy.org and eventually find a platform suits you most.