I'm still doing OK at BrandBucket and Squadhelp. My acceptance rate to SH Premium is ~30% with sell-through ~5%. BB a bit less than that on acceptance and sell-through ~2%. Between the 2 marketplaces I can place about 85% of my brandable domains. The rest go on Dan and Afternic.
I've recently tried Alter, but honestly 2 names accepted out of 50 submitted. So obviously haven't figured out what they want yet.
Brandpa has dried up for me. No sales there in 2020 even though I had at least a couple of sales there in previous years, but I only have 40 domains there. I think the quality went down and inventory increased a lot when they went to automated appraisals. I'm in the process of moving my Brandpa names to BB and SH.