What is the reason for postponing MAIN SALE 26 MAY 2018

Is this a good or unfavorable signal for investors? A week before the previous date, suddenly this? Does anyone know this how can it be related to the certainty that the upper lath will be reached and the declared amount of currency collected? Of course, I do not doubt the project and the team - but such sharp movements on the eve of the main sale - are justified?
I do not know what to think about it. is this ok? I belive that this summer will be hot to crypto and may be it will be hot for ICOs like Acorn too...!