I wouldn't bother. The amount you can earn from these campaigns are quite small, even for Legendary ranks.
I don't think no one will harass you for such a unusual income that no one is sure about.
Bitcoin is largely unregulated in the world and it will be difficult to regulate it once they make a significant effort.
This amount is also pretty small, so I don't see why someone would really care, as the whole signature campaign economy is very small.
But then again, I am not a lawyer, I have no idea.
maybe for those who always judge something with this result it is very small, but the signature campaign that is the goal is not the result of money but more in recognition, or legality, because bitcoin once again needs a real recognition or effect in the world of commerce, so it all depends assessment of some of the world community, the most important thing is that bitcoin needs all the support from its users.