Holy crap, there is a lot going on. I knew Curse treats Modders like shit, and Modrinth is much nicer, but I sadly also know that Curse gives Modders more money than Modrinth, because getting the Advertisement ball rolling takes quite some time.
I did talk with one of the Modrinth people a few weeks ago, and did criticize the “business model” of using ads in the first place, especially if the Modders would practically only get cents from their 100% cut of the ads on their Project Pages, because Ads dont really make money, unless they are for online gambling (cough curse launcher cough). At least they did admit that their File Hosting is extremely cheap and close to the 5 bux a month that I guessed (because if you pay more than 10-20 bux or so for basic files, you get scammed by the hosting provider), meaning it is not likely for them to just shut down for monetary reasons.
And supporting their Launcher is as easy as unknowingly breaking the ToS of GitHub, LOL. Turns out things like Launchers should never access GitHub Releases Pages, which I did not know about until OvermindDL1 told me recently. At least the GT0 to GT5 Project Pages I made to have a backup of their Releases on GitHub dont have enough traffic to be taken down because of that.