If investments do offer high returns then you should really think twice before putting up money on that site since these kind of offerings just do only exist on most scams do we know online but speaking on this investment which is 1.5% annual I could say it's really small to consider and wouldn't really attract possible investors.
Actually big offers means scam to me and i'm totally out of that offers since i know it is only a bait for us to invest, and 1.5% is so little and surely those who run that are only running a ponzi scheme since surely they can sustain there business if they give such low ROI like that and for us to be safe well its truly better if we just put our money on banks since im very sure that we can earn at them rather than investing at unsure business out there.