Yes, there are certain limitations of the OYO Refer and Earn program. A monthly sign-up limit of Rs.500, monthly check-in limit of Rs.10000 and a overall wallet limit of Rs. 10000. Keep in mind if your OYO Rupee balance reaches its upper limit, no referral will increase the balance anymore. Valid referrals will add to your OYO Rupee balance, only after you make a new booking using your OYO Rupee.