I've seen few projects that decieved investors into thinking that they will list on binance or okex and Kucoin without these exchanges confirmation, my advice is once a project claim they are going top exchange do not hesitate to go to the top exchange social media, if the listing is legit the exchange will atleast say something about it. Wise up
If they claim that the token will get listed in Binance, then ask them to show the proof for the same. As far as I know, listing in Binance doesn't come cheap. For a single listing, they are asking anywhere between $1 million and $5 million. So in case the project team is making such a huge payment, then they'll be having documents ready, which can act as a proof. Even the BTC transaction hash will be enough, IMO (in case the proceedings go to a wallet that has been flagged as belonging to Binance).