I don't even see any ads on their front page, which is the most prominent source of income for most faucets.
They don't need to run ads on their front page. they'd rather keep it clean to attract users to signup, then they would show them ads on ALL pages.
The fact that it's so easy to build up your balance, and there are mechanisms that essentially try to suck you into the endless cycle of slaving away for them (both your computing power and your labour), along with a high withdrawal threshold should be a sign enough that they have absolutely no intentions of paying anyone out.
What's the point of using them then even if they did not mine in secrecy?
You're exactly right.
I'm just curious to know what the withdraw button does. haha. I just want to click it and see what will happen.
Their ToS clearly states that no one will get paid any kind of real money. it's just a game. you can only use your credit for gambling on their website. the credit has no value. it's just a number.
With that said you would think that they're honest and transparent. that they're not bluffing anyone. BUT there is a section where you put your Bitcoin address to receive your payment after you reach the threshold. so I would assume that they're not as honest as one might think. they're probably liars. They're contradicting themselves!