Investors and bounty hunters are the one losing here, lots of projects that accumulated millions of dollars are worthless when they hit the market, no volume and price is down by 1000% if those coming ICO will not do buyback and the market continues to be bearish then it's all over for ICO and bounty hunters..
This is how they are supporting their early adopters. Other than this, it will imply like they are no more interested into their projects. Recently, one of my friend shared like he came across many very good white papers and high potential concepts but unfortunate most devs are losing their interest to continue their hard work after ICO. It means once they see some money, they just want to have vacation by forgetting their promises.
Not necessarily "over" if they can produce an effective product. But I get OP's point on the team buying back some tokens from funds gathered during the ICO then possibly burning them to limit the supply.
A good project must focus of product/solution. I do not have any argument on that. But, they must allocate some 5% to 10% for buy back of tokens and then after implementing their solution or after developing and after start profiting from the project they must focus on buy-back of tokens with up to 25% of their margin levels. It will be beneficial to them and for early investors too.