But also with GOG you can download the installers and play offline. It’s literally one of their big selling points. It’s less convenient than things like steam, but you can do whatever the hell you want when you buy it. So in that regard, it literally is a purchase. Or as close as you can get with digital goods.
I feel like they’re doing this because they are going so hard with steam deck. Regardless, good on Valve for doing this.