Most likely would be burned - if it's not using its own blockchain. If it is, then we'll have to wait for clarification from Dev
No, unsold tokens won't be burned, Team will keep 99.3% of total supply, which means is basically a private blockchain.
What do you mean with 99.3%? 99.3% from 500 00 000 or from 997.8 million tokens total? Do you wanna tell us the stash team has sold only 0.7%?