Why are there games that need energy to play?

I actually was just playing on pogo and got mad about needing more energy to finish my game, so did a search and was glad to find somebody else who felt the same way!  I try to avoid the games that need energy, etc. It's just annoying.  And when you're trying to win pogis and all you have to choose from are these games, it sucks.  And now they got Wheel of Fortune but YOU NEED THE **bleep** ENERGY.  I guess another game to toss off my list, along with Merge, Solitare Home or whatever it is.  Keep em all.  Maybe look for another game site to play on that doesn't have these annoying things!   When you want to play the game you want to keep playing, not coming back later.  Also won't purchase anything off pogo.  I did once and that was it.  Never again.  If you find another site, let us all know.  This is my BIGGEST B about Pogo.