I’m still getting $50-70 a day, and if I do have a bad day, generally the missing installs come through in the next day or so. Any decline is down to the usage of my apps slowly tailing off as they get older which is to be expected.
All my apps are still using pretty old versions of the Revmob SDK, if it ain’t broke don’t fix it was my approach - obviously any future apps will have to use the new SDK.