Now, OP has got a clear answer whether Notcoin is real or not. Well, it's been listed from several known exchanges and that only proves its legitimacy and how the project is well supported by these big exchanges out there. It's also making waves that this has given the thought for other new projects to come and get closer to the TON ecosystem and economy to start supporting them as well and develop more projects that lies on its ecosystem.
But I think the telegram vote you got for NotCoin might be fake, because it was listed yesterday, almost all top few exchanges have listed this coin. And those who were mining hunters were able to earn the most money from this Notcoin project. So I also think that you should be careful from such fraudulent sites these days.
Be careful of many fake projects. It's common that there will be some scammers that will try to imitate the successful ones and they'll say that you are still eligible to get some of the Notcoins and you'll receive voucher of it. Don't believe with these false claims because airdrop was already done and if you still want to get eligibility for it, you join the exchanges that are supporting it by having a launch pool.