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JDownloader2 asking for donations to keep it "free of advertising" while showing an ad on the same screen
(feddit.org)
It also says "free of installer bundles" while (at least in past, don't know about now) their default windows installer was including ads (source)
P.S.: If you want to disable the in-app ads, here's how to: https://gist.github.com/yunooooo/87564a0293a1c7a53fb3e233a604c638
Recently set up pyload, it‘s good for what it does. Or are there any pitfalls I don‘t know yet? :)