It is an allocation of fractional units in the order of subscription into the system, where those who reserve first will have the right to allocate the full amount they reserved first. In simpler terms, first come, first served. The allocation will proceed in this order until the total amount offered for sale is exhausted.
Fees and other transaction-related costs will be adjusted accordingly based on the number of fraction Units allocated. This allocation process aligns with market mechanisms and the preferences of the token issuer.