You should understand one thing,
Ok... I will try to understand "one thing".
no matter whether it has blockchain or not, we cannot interfere.
Huh? If something is so obviously a scam, why wouldn't we be able to point it out?
The only thing we know here, is the difference in the way they advertise, no one will argue anything if it doesn't include the words "earn 10% daily".

If this coin has no blockchain, and has the same magic words as the other IEO's they did (Moon, Uranix etc), they will probably suffer the same fate- that is = 1 sat after pumping & dumping it.
What are you trying to argue here anyway? That if they didn't use the "10% a day" phrase, everything would be alright? That no one would argue anything? I disagree. I don't think the 10% matters much anyway. It certainly isnt necessarily the decisive factor for me... The Moon tokens didn't include those phrases either, (look how those turned out) and so they're really not a requirement to call something a scam, and yes, yobit's IEO's are
scams.
I think Etherscan will not intervene deeply in this matter, they just make sure that their ads are valid
They exactly don't, which is the problem.
(Although i would somewhat agree with darkstar, - up to a certain degree it's the user's responsibility, not that of etherscan, to check how "legit" a token is. If the token is as blandly advertised as it is- normally i wouldn't put much blame on the advertising party (etherscan) - but, in this case, anything coming from yobit is a big red flag in my book.)
It's not in their interest to make sure their ads are
101% legit, so as it is not in your interest to understand what exactly you are advertising, for which i'd like to refer you to a thread i made about Yobit earlier this year; here - >
Topic: Yobit Scam Accusation megathread. "Normal" modus operandi or shady practices?