I say that lots of alts are scams, because they are made in a way only to profit the the creators.
They offer basically nothing new, they are clones with a catchy name, and unskilled developers.
People pump the coins to make a quick buck, then they will dump it as soon as they are done with it. They can start the process over again then.
ICOs are almost worse, people just throw money at people they don't know, they would never invest fiat in these scams!
This and the problem is all ICOs are made such that your investment is actually a donation so they have no obligation to their funders.