I've backed a ton of stuff on KickStarter and I can say that it's completely normal for delays to happen, especially if it's the peoples first time doing something of the magnitude they're doing.  Or if it's something like Exploding Kittens, where the amount pledged made the delay.  I'm still waiting for a game that I pledged to that had an estimated delivery date of October, but the game is a beast and I knew from the get go that these new publishers would have a lot of delays for timing constraints they didn't think of. But six months for a deck of cards is ridiculous.