Such projects that are associated with the Cashback service are becoming very popular and in demand. But so far there are no such platforms in Crypto. You can say that you have no competitors.
I was also looking for a similar project and did not see anything like it like it. I also think that the competition here is not so big.
But now there is such a project. But I do not understand until the end. What currency will be refund. Will it be possible to make purchases in cryptocurrency.