Gog doesn’t* (as often?) sell licenses that can be revoked as part of purchasing eula and therefore shouldn’t really have to remove the misleading ‘buy’ word.

Many steam games you don’t own and aren’t buying, you’re being granted access that can be revoked by the property owner. That’s not just steam.

*I’m not a big Gog or games purchaser in general so I’m not sure if that’s accurate. I’m sure you get the point though.