thank you, and do you know how long have I to keep the signature in my account?
Participants need to keep the signature until the end of Tokensale (Februrary 28th 2018 17:00UTC). However, we are thinking of changing up the structure to a reward based system, where the users who have held the longest will receive more bounties exponentially - so stay posted!
and stakes will be assigned every week or when the ICO finish?
Stakes will be assigned every week. We are slowly transitioning to the second structure, to benefit our supporters! So if you sign up now, you will be an early participant in the bounty, earning exponential bounties over your peers.