We understand that for now we haven't any reputation, will try to solve it.
Yes, this is a major dilemma
you need to solve or I would urge everybody here to not send anything to this mixer upfront. Or you can send coins at your own peril.
I suggest you consider escrowing a certain amount of bitcoins with a reputable escrow provider here. A trusted middle man who can hold the coins until you have sufficiently established credibility and integrity over a certain period of time. Without both and most importantly, without a solid element of trust and legitimacy, this mixer will be seen as coin churner for the OP and the claimed developers (if any really exist). A coin scamming website, to put it more bluntly.
Mixers do not evolve overnight. It takes time, trust and a resolute effort to build a stable trust-based relationship with clients. An example of this is the mixer on my signature which has perfected the art of obfuscating bitcoin transactions.
Great ultimatum

. I didn't say that we need reputation
right now or asap

, we know that we need some time to gain it and we doing it step by step, we are not hurry. A lot of people already trust us and for now it's enough. As i already said we preparing signature campaign and after launch will think about amount for escrow, thanks for your advice.