Correctly. The group wallet will be credited with the bonus from the ICO project, and its size will be significant, since a group investment allows you to invest a decent amount of money. Once the timer has expired or the maximum threshold of the common wallet will be reached, the smart contract will send the sum on the common wallet to the ICO which will issue the tokens with the relative bonuses.
the user will be credited to the portfolio from which he has invested, the amount of tokens due.