Yes it is gambling and everyone should not play with more than they want to risk. However, at least Bitzuo is running an "honest" game here. He has not been siphoning out loads of BTC for himself like a lot of the people running these aka "Satoshihype". He has also run his rounds until the deposits stop to give everyone a chance to get paid as much as possible. Many scammers take in the deposits then just stop paying and disappear with the remaining BTC. He also does not proclaim that there are real investments here like the other HYIP pretending to be real investments or things like "bitcoinmagic" LOL
Nice job Bitzuo on running a good site!