The @TeamYouTube auto-gen thumbnail experiment doesn't sound bad with .03% of viewers affected but that's about 30K of my subs. So at 16 uploads a month I may have half-a-million potential views compromised because I look like I'm midway through a sneeze in my thumbnails. Great
I'd like them to have a reason for it. I get we're using their platform so they can do whatever, but it does screw with people's incomes and for those building their channel to even start to have an income (thanks new monetization rules), it will make it that much harder.