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I received your letter of appreciation (stating that I have completed many challenging maps, which is quite amusing).
Here are my thoughts on the matter:
I myself am a modder, and I have been involved in modding games like Gothic 2 (I also participated in translating two large mods from German), Warband, Battle Brothers, and several others to a lesser extent, for many years. For me, free modding has always been an axiom, and I strongly oppose any form of payment, even in the form of voluntary donations.
Moreover, I am against the commercial creative industry in principle.
Creation is something that people do for their own enjoyment, realizing their own dreams and desires. If this (a book, a mod, a song, a YouTube video) is released publicly and becomes popular, then a pleasant bonus is the gratitude from those who also liked it, and in special cases - fame.
Money has no place here, unless the project itself requires material investment (such as films, which require huge amounts of money for sets, costumes, etc.).
Yes, modding can sometimes be a pain (finding and fixing bugs, for example), and you can also burn out if you work on the same game for too long and get tired of it.
But in such a case, the best solution is to simply step away and do something else, rather than forcing yourself and, at the same time, begging for money, trying to artificially motivate yourself.
There will always be someone else to take your place. Someone who has only recently become interested in the game and enjoys it.
Turning creation into work is a perversion, in my opinion.