Yep, it's definitely a scam.

It tries to fool you by suggesting that withdrawals can take a really long time but there's no genuine reason to take so long, it's just to convince you that you're actually going to get your money so that you might keep reinvesting or referring people.

No site that suggests exact returns is legit, especially when those returns are very high and it doesn't mention hashrate, electricity or maintenance costs etc.

Cloud mining in general is a pretty bad idea - even HashNest which is legit is not necessarily a good investment and I would avoid them because Bitmain has too much of a monopoly on mining in general.