You said it yourself that you do not care if they are legitimate and gave no reason to why they could be legitimate. If you think they are a legitimate business and not a hyip/ponzi, please enlighten us.
There is no connection between legitimacy and ponzi. A legitimate company can be ponzi and illegitimate service may not be a ponzi.
Some signs of a ponzi, if you are unaware:
I am familiar with these signs, but this is only a warning, not an absolute truth.
At the moment there are no facts. In my opinion this service should get a chance. But I can be wrong.