well if people think every track they do is release worthy, then they genuinely need to look into quality control. Unless their output proves them correct. I couldnt name a single producer that i love whose every single record i love, even my fave producers of all time have done what i deem to be a bad record, absolutley everyone does a bad record at some point in time, myself included. I dont personally think i have done a bad record yet, but i know for a fact i will, even the most focused of human's misjudge's at some point, that's just exactly what make's us human in the first place.
and regardless of quantity, you'l only make money on your records if they are selling. Doesnt matter if you put out 20 records in a year or 1 record in a year, if people dont like it, it's not going to sell. And even then nowadays you need to be selling silly amounts to get a profit. Most artists money comes from the gig's they harness. Unless you cross over into that superstar bracket like people like Preach and hooking up with really big commercial artists, because doing that obviously widens your fanbase to non-techno punters etc etc
you will get more sale's if you have a higher threshold with your quality control, because your music will be alot better, you'l be spending more time on your music to ensure this, and people who are into your stuff will ultimately enjoy and be more hungry for your music when it does come out. If your putting out like a record a week, which is what does happen alot of the time, then most average punters simply cant afford to be buying records every week, so inevitably sales can suffer