First of all, the GAAS trend is too common for my tastes. It especially annoys me when it's applied to pre-existing IPs. But there are some that have done it relatively well.
Animal Crossing: New Horizons - Now I never wanted this approach for Animal Crossing. However, let's examine what it has given us....
-Items
-Events
-Emotes/make-up
-More features (diving, artwork, etc)
All for free.
Star Wars: Battlefront II: This started out as a disaster. Thankfully, Dice really turned things around. By time I got Battlefront in early 2020, there was a lot to love.
While I appreciate that Super Smash Bros. Ultimate has given us some free new features (stage builder), it's not making my list. The fighter packs and season passes are overpriced. I still buy them because I want every stage and fighter.
Rocket League: I'd put off buying it for a long time. Once it was finally free, I jumped on board.
Lifetime Sales Predictions
Switch: 151 million (was 73, then 96, then 113 million, then 125 million, then 144 million)
PS5: 115 million (was 105 million) Xbox Series S/X: 57 million (was 60 million, then 67 million)
PS4: 120 mil (was 100 then 130 million, then 122 million) Xbox One: 51 mil (was 50 then 55 mil)
3DS: 75.5 mil (was 73, then 77 million)
"Let go your earthly tether, enter the void, empty and become wind." - Guru Laghima