Klondike Solitaire HD

There are 2 major solitaire/mahjong/card game studios on the chrome game store: TreeCardGames and Battleline Studios LLC. They're both cloning solitaire and other card games literally hundreds of times, littering the chrome app store with trashy, oversaturated card games. Why do they do this? revenue. not to produce quality games, but to earn revenue with little effort. Basically, just look up solitaire or whatever on google and check out the first few results instead of installing a game that needs a login or is ad-riddled.