Of course some are helpful while some are not, like an IEO or ICO, not all projects are really useful and in fact we can only count the projects that has really survive until now, some just show up for a while and gone forever.
temporary hype maybe we could called it, some project pay cryptocurrency influencer to shill their project and so we see it could survive only in cuople months. different with project that have real quality, no need to shill and investors will come by their self. personally i am hope binance IEO will on fire again , i miss profits more than 5x from this IEO platfrom.