TataNeu again has Neucoins reward for paying bills, valid for 2 days (attached screenshots).
Did mobile recharge and instantly got the 25 neucoins. Just keep in mind they are valid for only 90 days. In addition will get 5% back as neucoins next month since paid it with my NeuCard Infinity.
But they should actually work on improving the User experience rather than pumping money to give offers. Their App has so many many many bugs.. I dont know what their Tech Team is doing actually xD