Yeah, there's nothin' wrong (outside of Capitalism At Large) with wanting to get paid for your work, and there's plenty of places to do it.
But I'm very nebulous about paywalling mods, because A: someone can just remake it and release it for free in a lot of cases, in a very legally dubious situation to begin with, and, just as important, B: fracturing a community with paywalls is a great way to harm and maybe even kill that community.
That's why I went further than simply poopooing the idea of Bethesda being solely at fault for trying to get their extra bullshit cut, and looked more toward cautioning against the potentially disastrous act of paywalling parts of something that are built on a community sharing their work; not just in making the mods themselves, but the road up to, including, and after that show the act of creating mods is rarely, if ever, lone individuals - in learning about the thing, sourcing bugs and reproducing errors, collaborating to create new and improved external tools for everyone to then build upon, and so on and so forth, the magic of modding communities.
It smacks me as quite unfair if some are getting paid and others aren't, or can't easily because of the nature of the thing they're making (OpenMW being a great example of one of the best projects to ever come out of a modding community, and one of the least likely to be legally profitable), and that's probably because modding is such a community effort and environment that bringing payment and profit into it can be enough to kill it.
If you're doing, y'know, commission work, or other paid work involving mods - great! I just hope it involves setup that doesn't involve paywalling the work, because, especially in the modding community, it... Never works.