For sure. Easily half (likely more) of my unplayed games are Bundle games from a bundle I got primarily for something else. There’s a few gems I’m sure.
There are a few games I bought on sale to play later as well (I’ll get to you!) but the other glaring flaw I see is a selection bias. The people who use this service or similar services are going to be the heavier Steam users with collections in the hundreds.
So heavier users, with lots of bundle games and sales. I’d divide that total by 10 at least