Mobikwik is giving supercash because there is very less benefit to customer & very high benefit to mobikwik. Eg. If you get 20Rs supercash on Mobikwik, you can use only 2Rs in next transaction, after that only 1.8Rs and so on. So, to use up your supercash you are compelled to continuously do transactions on Mobikwik only (with very little benefit or use for you but high benefit for mobikwik as they earn 2-15% per txn). Also don't forget it's validity is 45 days only, after that, it's gone. So most probably it will lapse if you don't do many (I mean: too many) transactions.
Whereas in Paytm, Payzapp, Pockets, PhonePe, Freecharge & other places, you get direct cashback which can be fully used. (On paytm and Phonepe you can even transfer it to bank for free now). Their offers are less but 100 times better than mobikwik's.
Surely you can use mobikwik if there is nothing available on others & you like it. But SUPERCASH is a sly & thug model, worst ever.
Also, Mobikwik has a history of cheating many customers with me being one of them. (Now they have stopped doing after lot of negative publicity I guess).