Indian Railway train ticket booking: MakeMyTrip, Ixigo offer options to book tickets with zero-cancellation charge only if you do this

Railway ticket cancellation costs are higher if the e-ticket is cancelled when departure time is less than 48 hours. However if the e-ticket is cancelled when more than 48 hours remain from the train's departure time then the cancellation cost is standard. However apps like MakeMyTrip and Ixigo have launched zero cancellation charge policy if some additional money is paid while booking the train ticket.