I have experienced many things while hunting for bounty prizes, when I joined one of the bounty projects I supported it for almost two months and when the distribution of the project was a scam I was very disappointed.
It's not always about how long the bounty duration lasted for, I've joined a bounty for months and still end up with few dollars, I think 12$ maybe, and there are bounties that will just take you for 4 weeks and you will get a surprising reward in the end
lots of people here already experienced that kind of scenario, you are lucky enough that you just participated for 2 months, unlike me I experience joining bounty program for almost 5 months and in the end I got nothing. I also experienced that I joined for a couple of months but the reward is not that much.