Ubisoft Quarts had 15 sales for 50$, total revenue: 745$ - https://objkt.com/collection/ubisoftquartz
And only 0.665 % earns money on OpenSea. Concentration of it is way less, you can just crawl the collections. 5 collections dominate all the rest and only the first 266 collections earned > 0 eth. The other 40 k. earned 0 eth. It's obviously not a way for an artist to earn any money.
Script to reproduce ( linqpad): http://share.linqpad.net/wkbrut.linq
Beyond the hype are the numbers :)!
Edit: Didn't contain the script.