As a content creator myself I don't have a problem with modders getting compensated for their work, in fact I encourage it strongly. Why should their hard work go unrewarded?
And the modding community is strong, it really is and there are modders out there who truly believe in the idea that mods should be free for all and that's great, but the beautiful thing now is that there's the option for modders to charge for their work. If a modder don't want to, they can release it for free while the modders who wants to charge money for it do so.
The two things I have big issues with are:
1) Profit cut. I'm sure it will balance itself out and the market will find a good middleground once it's been established, Beth setting a 75% cut is very steep and it's unfortunate but time will tell how that will change. It IS only Beth so far who's doing this thing together with Valve after all so yeah, time will tell.
2) Vetting. Both Valve and Beth have stated that they won't police the market themselves for copyright infringement, overlapping mods that don't work together, stolen content from other mods etc. They want the system to be 'democratic' and therefore they let the community take care of the vetting process themselves. It's a huge disregard for responsibility over the system they set up and I think this is my biggest gripe. Opening up a brand new market for people that most likely don't have a history with things like owning brands, marketing, legal rights, copyright etc is a huge oversight and I hope they will take a step back and set up regulations because this won't end well if they just drop it like it is.