I think all the unsold tokens will be burnt for good and remembering well I can say it was offered 1TNG=0.10 ETH. They supply of tokens will remain very less and demand will increase over the time depend on the usage of the exchange and features. I hope my statistics are correct and I am not doing wrong calculation here.
Another meaningless comment. This token (TNG) is not worth anything, irrelevant of the supply. Nobody wants a useless token.