Yeah, I'm trying it out on my Steam Deck. This might just be what gets me to start buying from GOG instead of Steam:

We also started a partnership with GOG and now every game you buy from the GOG store inside Heroic will give us a commission, so it is another way of supporting the project. :)

Before then, GOG just didn't support my platform of choice (Linux desktop and Steam Deck), so I always felt like a second class customer (though they did make installers, which was nice). Steam supported Linux since 2012 (I made my Steam account in 2013-ish because of that), and continue to support Linux through Proton enhancements.

However, now that Heroic makes something from GOG sales, maybe I'll actually buy a few. That's close enough to supporting me that I'll give them a shot.