It is, but for it to work you have to give the appearance that it is actually working for a long enough period of time. That requires exponential grow or most people reinvesting returns (so they don't realize there's no actual money to pay them back).

If you give the returns immediately (the two stickers) with no option to reinvest, the ponzi scheme is going to run out of steam very quickly and there's no way this is going to attract a lot of people.

In summary, this is a Ponzi Scheme, but not one that has a lot of chance of being sustained for very long.