Absolutely not. Sounds scammy. Take a second look at the project, please. I also participate in bounty programs and I consider maximum three months as a normal period to get the reward but usually, rewards should get paid within one month.
If you are lucky and you are participating in a fast company, then yes. And in most, as correctly said - I count on 4-6 months. Also, if the token comes to the purse - not the fact that it is on the exchange. And to sell for a penny ... Not for this you have been trying to earn a few pennies.
It's ok for me to wait 6 moths reward than nothing. It is important to us have patience so that we have a good future.It