Ignore anyone who confuses an offering's unit size with it's minimum size. They are staggeringly clueless on the subject, the equivalent of a person in geology confusing an atomic element and a chemical compound.
Example:
So no boys and girls, that does not mean NAK’s offering minimum was 45 cents because that was the unit size.
LBSR did not state a minimum offer amount in their official filing. When a company states that want to raise X amount in a set time period, that makes it a closed/all-or-nothing offering.