why devs should deposit tokens here and then distribute as airdrop?
Our platform primarily aimed to serve ERC-20 tokens. Right now to send Airdrop Token developer have to pay a lot in gas fees just to send otherwise free tokens to the recipients. This vastly limits audience for token distribution. Our Airdrops are done off chain and much more flexible, meaning token developer can Pause Airdrop at any point of time, Refill airdrop's budget or ensure that Airdrop being redeemed by unique users (Any airdrop can be made available to phone verified users only). Devs can even run multiple Airdrops at the same time.
how bounty hunters can be sure that they will receive the full code?
There is no way to be 100% sure. It won't be more effective then hiring actual escrow, but who would hire escrow for bounty that usually have pretty symbolic reward?
Besides, binding voucher can be made with extremely long lock time (A year or five years) - this may further assure bounty hunter that at least his payment won't be usable by bad character for years if he will decide not to pay.
as for first question i can see it may reduce dev costs on paying the payment fee, but how can he/she trust to deposit a big amount of his tokens here?
Excellent question. We are aiming to serve new developers, those who just began their promotion campaign. Ideally we are aiming to list tokens even before they went public with the project. At that point tokens don't have huge market cap, and in case something will happen to the deposit it will not be a huge deal to simply create new token instead and make another airdrop.
for bounty hunters, i think if the site some how accepts to deliver the last part of code after completing the tasks (like global bounty) then it can be promising
We are planning to introduce basic tasks like "join telegram group, make a Tweet and similar" that are required to redeem certain airdrops. However this feature is scheduled after we launch ETH markets.
btw, is there any settings except the security menu option?
There are none currently. However we are planning to extend user profile to allow integration with Twitter and Telegram soon (that will be required to track tasks completion). Full KYC is not not in our immediate plans.