Again, no respectable developers do this. You are arguing that it is more convenient on Android to use end users as beta testers. That is not acceptable. When has a developer of a desktop app ever released multiple versions to end users multiple days in a row to track down a bug?
Spending a couple hours looking into a problem and saying "Screw it. Let's see if this works." is not how good developers work.
in mass betas (aka release a beta to the app store) is just another way to speed up things in open beta.
As for desktop app I have seen a few in the beta line hell I know of even some big name games that had multiple updates in a single day. I believe there was a few for TF2 that have some out. Is Valve not a respectable developer?
Some bugs you be missed in and near impossible to fine with a small group of beta testers. Big time for bugs that have happen at random and are not repeatable.