They cannot give you an ROI because it is either low or negative(they nor I want to do the math now). There is dillution of the token that nobody talks about until the break even.(which nobody has yet, I don't think). There is a google doc out there that lists all the stakes and it could help with research. I will have to look for it.

Edit: https://docs.google.com/spreadsheets/d/1AiiI_zqwb4g37aiteoIiprStIYl2M_N4F0aETyfZ8K4/edit#gid=0
This is the google docs that shows all the stakeholders. You will want to read up on how the tokens are created/burned first to find out more of how the ROI is calculated.