During the last Tap in bonus, I went to put $50 in, and it went into the steam wallet.
I thought it was going to go into WGT and it didn't. I finally asked, either here or in a facebook page.
I think it was MarchieB, He said that I had to put it into the steam wallet and then draw it out and put it in the game.
I should have just put it in on the WGT Webpage and saved a lot of grief. It worked out in the end.