Are the dates of the IEO already known? Can they depend on the activity of investors in your project?
I saw the first information on Latoken
from 15.08.219 to 22.08.2019 = 25% bonus
from 23.08.219 to 31.08.2019 = 20% bonus
from 01.09.219 to 16.09.2019 = 15% bonus