So you donate money, so if this scheme end you are not legally entitled to you money as you gave it away by means of a donations.
A person entrusted to receive donated funds from a community member is a person who has bought a dream.
So you trust your money to other people and and other people are always trust worthy. (sarcasm)
For instance, if you deposited R5 000.00 you can be trusted to keep R3 000.00 and when you decide to use that R3 000.00 you will be suspended and lose your membership and profits.
Where is the other 2k? who has it?
The money you donated to a community member accumulate profit
Where does this profit come from? is it a situation where your "Profit" is just other peoples money (possibly the 2k difference above).
That is why this community is a self governing and self regulating business because funds are kept by the community and not by the company.
So they avoid having to comply with all the regulation we have for banks taking deposits.
The company makes a profit by exchanging currency because all currency is subject at being exchanged from currency to Coin rates
You don't make profit by exchanging one currency for another, you need a change in the value between currency before you make profits unless you are referring to transaction cost on exchanging one currency for another like a bank does when you buy other currencies, but then to whom is this costs charged since everyone seems to make a "Profit". And these currency to "Coin" (intangible object created and controlled by them) rates, who determine these exchange rates?
Conclusion, there are way too many things that seems fishy.
P.S. There is no low risk investment that will turn R5,000 into R10,000 withing 3-5 months or R5,000 into R100,000 within R100,000, Turn R500 into R2mil in 48 months? this has the hallmarks of a Ponzi scheme.
I would advise anyone to stay away from this and anything financial investment that you don't understand, and even though I consider myself to have a high level of financial understanding, I will admit that I don't entirely understand this and
would avoid it at any cost.
Edit: Seems like a crowd funding website where you fund someones dream and others in turn funds yours. So with your dream being more than you put in, the amount funded by people would have to continue to increase for everyone's dreams to be funded, very ponsi scheme behavior and should not be seen as a investment
http://www.bdlive.co.za/business/2013/07/28/poor-man-s-ponzi-takes-195000-for-a-ride
A very important concern is also that your return is not paid by this company but by other members, so this seems like a great way for criminals to use you to launder money.