1. I send you BTC using address for which I have a private key
2. I sign message by Crypti team using private key and reedem Crypti coins to address X
3. I complain to you that I have not received my Crypti coins to address Y

1. I send you BTC using address for which I have a private key
2. I sign message by Crypti team using private key and reedem Crypti coins to address X
3. Crypti team instead reedem coins to address Z

In above cases, you have no way to prove that either me or Crypti team cheated.

"The online issuance system will match your signature against your sending BTC address. Once matched successfully, the system will ask for your Crypti address, so it can
issue the Crypti coins."

https://github.com/crypti/crypti-docs/blob/master/presale.md

They would need to ask for my Crypti address before I sign a message so that message I'll sign contains address in question.