Is crowdfunding as an investment legal?

From my research I know that debt-based crowdfunding is legal in India. Crowdfunding platforms like Milaap have successfully being doing this for some time now. But they do not get a higher return than their investment. As in, they only receive the principal amount, over the course of the loan tenure in equal installments. I was wondering if crowdfunding as an investment where in lenders get a return like a Fixed Deposit account is legal. So if I through crowdfund, give 100$ then with interest I get 110$ back over a period of time. Your help is very much appreciated.