By providing a free competent competitor to other Office software bundles.

This is a bad argument. Established things are established. “If you don’t like what the president of your country is doing, just run for the office yourself.”

Okay cool, I don't ask for donations. Instead I just sell my product, something like a Office 2024 license. 120 Eur a year, but feel free to use it as long as you like. That's what I bought recently. I don't want Microsoft 365 with the cloud storage, I pay Dropbox for that and use some other client to use it basically as a extra storage device for backups. I just need an Office suite, Excel, Word, Powerpoint. Yes: LibreOffice is nice and all, but doesn't work for MY needs.

But I get your point: having a succesful Open Source (FLOSS) app without dono's isn't possible, you need to have some to make it work anyhow.