If you are on Chrome the extension "Personal Blocklist" will let you exclude results from specific sites. Just tried it for reverse image search and it worked for me.

Made about as much on Pond5 with photos this year as on Dreamstime and 123RF. Nothing to get excited about but it's something, 50% royalty is rather fair and you can choose your own prices.

I just started off with Canva and uploaded about 900 photos. Nothing special, mostly travel. ~30 got rejected and those almost exclusively because of too many similar uploads or debatable editorial content. So same experience as sgoodwin4813 and Dumc.

All in all, they haven't been picky in my case.