Choose your license well. If you are using a permissive licence (MIT, Apache, BSD, etc...) you are begging for it. If that's what you want (and it may be what you want), go for it, but don't expect it to pay the bills.

If you are using a copyleft license, especially AGPL, you may not get paid either, but you may get valuable contributions in return. It is also a good way to avoid having big companies profit from your work, if that's what you want.

If you want to make money but still want to open source, use a non-free "source available" licence (ex: "non-commercial"). They tend to be unpopular in the open source community and it is probably not the best way to get known.

And then you can have dual-licences, like GPL + commercial. Qt is probably the most popular software using that scheme.

But I don't really understand the people who publish software under a permissive licences and get forked by some tech giant and complain. That's what permissive licenses are for!