You guys missed the update, on the first post they mentioned bl4nkcode will be their escrow
Looks like the campaign has not commence yet as per schedule, and as of this writing, funds still not deposited as per.
As of today, supawin rep didn't responded yet and the site is currently down for this moment.
[EDIT] I just saw one of the admin's message on its telegram group, and seems the team is currently working about the site, though never responded related to the signature campaign.