During thier initial days they were top of the game and i really liked their voucher system but slowly they discontinued it but they had fast processing services. It is good that they have comeback and now they have a big competitor i.e wazirx and it is dominating right now so in order to compete with it lets see what new promotion stuff they do.
But the thing is Zebpay isn't stepping into fiat trading for now. All they providing is wallet service and crypto to crypto trade. On top of that they are also charging 0.0001 BTC if you don't do any trade during the month. Since we can do crypto-to-crypto trade on any international exchange like Binance, I don't think Zebpay's return is any mega event.
If they decide to offer some kind of fiat trading via P2P in future only then they can really possess serious competition to WazirX else no chance.