Because they don't study the history of ICO's and all they think is that they'll still get a chunk of profit upon investing. But it's not like that anymore because it's on totally new situation now and it's about to die.
It is not because they do not study about the market, they just do not have the idea to make things successful nor wanted to complete the project, all they want to do is to come up with the idea and start collecting money and they know that they will get some investment and that is what they are looking for, stay away from any projects that are coming up in the next one year as all are eyeing for the market rally to cash out.
Yes, with that idea. They will recycle all of those ideas and the habit that they have with the previous projects that they've done. If the first project they've made became successful, later on they will abandon it to create a new one.
They recycle the same idea again with a new marketing strategy and that is happening in the market for a long time.