If I do buy something in Gems of War, I tend to do it on Google Play because I get points for my purchases. Sometimes, games have special earn rates where you’ll get bonus points per dollar spent (instead of the usual 1 point per $1, you’ll get 2-3+ per dollar spent). I’ve never once seen Gems of War represented here. Typically there are only ~6 games listed with bonus points.
Furthermore though, the “Use” section of Google Play Points lists far more games and apps, probably around 50, that you can redeem your points for in-game things at a better rate. For instance, you can redeem play points for Google Play credit at 100 points per $1 (which would mean you spent $100 and you get $1 back, but there are other ways to get points).
However, the games listed here have deals. Like you can get a $4 coupon for Angry Birds 2 but it only costs 200 points (so it has an estimated value of 400 points), or a $12 coupon for 480 points (estimated value 1200 points).
But I have never seen Gems of War listed here either.
