Re:Support open source that you use by paying the maintainer...
by alexcohn on Thursday February 24, 2022 @05:54AM
(#30453298)
"Exclusive contract" is often not merely a problem with income declaration, it may legally require that you can only get payed for your work if the exclusive employer explicitly permits this specific incident.
It is a bit of a pickle, either go full consulting on your FOSS product (which might not be realistic), or work in something unrelated for someone else, getting something in between is hard.