Depending on the ICO project and if the ICO is extended, the Bounty is also perched.
The number of ICOs now being extended until the end of the year, for example ARAW tokens and REDCAB.
if you look at the ICO time of several bounties this year it is very much extended. I don't know why that happened, whether because their tokens have not been sold out, or they hope that the price of their tokens will be better if the ICO is extended.