I think adsense earnings dropped since oct 2018 or something, and it often refuses to fill up impressions. Also what kinds of ad units do you use? I m testing

I think adsense earnings dropped since oct 2018 or something, and it often refuses to fill up impressions. Also what kinds of ad units do you use? I m testing auto ads now and seeing a drop in earnings (which is typical for most of google's automated recommendations for me). What alternatives to adsense monetization are viable nowadays?