Do you have a softcap here? What will you do if you will not reach the desired results and will not collect the necessary sum of money?
In my opinion, the option is very simple, if the project does not collect the necessary soft cap, then it either extends the time to collect the required amount of funds, or simply returns all the collected money to investors.
I do not know many projects that returned money to users but sure there are some. In most cases they extend time to collect more money. But for how long time they can extend time? Sometimes they extend time to collect the necessary sum of money for one year or even more and such situation is not good for the investors.