Some ICOs do indeed delay, most of them do so because their targets have not been reached. And if it is due from the time that has been postponed, they will do the distribution of coins based on what they have achieved. And there are some who succeed, but there are also some who do not reach the target. So that the income earned is only a little.
If you have already plunged a long time in it, I don't think you need to leave if they have softcap if you leave, it means your efforts will be in vain.