Just visit Telegram group, everything clear now, the administration made a pinned post (https://t.me/adsigma):
"Hello Everyone,
Despite having a great concept and team, we didn't reach the Soft-Cap for AdSigma ICO.
As promised in the white paper, in case we didn’t reach the Soft-cap, we will not be moving ahead with the Project.
This means, the ADSI tokens will not have any value.
We have already re-funded all the contributions to their respective ETH Wallet addresses as promised..
Multiple members have confirmed the same.
For AirDrop & Bounty participants - We really appreciate your help in spreading the word in the campaign phase. However ,please understand that the tokens are of no use now and will be disposed off by our team.
Once again, we thank you for your contribution" @subhashchy