Cryptoworld is so young so it is hardly can be told right now whether all alt coins are scam or not. Personally, I take any project announced as a betting or gambling network with a grain of salt.
Actually, at any point of ICO a team may decide to abort it and run away with the money so it is really only up to them.
I do wonder why mention betting or gambling? Why do you think the notion of betting or gambling make it more likely for it to be a scam?
I'm asking since we released dueltoken (
https://icoholder.com/en/dueltoken-io-20170) and would like to hear your thoughts on that. Although we are not aiming for a 'casino' kind of betting. We actually believe (and noticed from experience) that betting a small amount in any game between friends makes a game much more fun (ever played poker with no stake?).