For now, yes. And for that I'm glad.

But it doesn't take much for a modder to decide 'Hey, I can make money from this tweak I've made' and remove the free version from the Nexus, and sell it only on the Steam Workshop for whatever price they want. The pay model isn't great for them, but many will see it as better than nothing and get on board.

I'd be happy to donate to modders, hell I've done so several times. But it was out of choice, as a reward for good work, because they'd made something of high quality. I played the mod and said to myself "Yes, this is worth money." The other way round doesn't work because there's no guarantee of quality - if it's crap/broken, well, you've paid for it so suck it up.

As for getting them elsewhere, I already do. But it's not too far fetched to suggest I won't be able to do so as easily if this concept stays for good. After all, many modders won't object to a bit of cash, and Valve/Bethesda won't take too kindly to free mods taking their revenue.

And the final thing I'd like to mention is that I don't even mod as extensively as other people do. Sure, I likely have larger-than-average mod list (I think I'm at about 140-something as of yesterday), but I know several guys that use even more than that. A friend of mine went over the plugin limit (255) and had to merge .esps to get all his mods in. He'd be paying more than me if the new system becomes the norm.