Even though today is well known for pranks, the law doesn't consider that a valid defense. If you offer up commission slots and later retract them because you only meant it as an April Fools' prank, you may still be bound to do those commissions because you made an offer and others may have accepted. A retraction of your offer after acceptance may still be a breach of contract, and your commissioners will still be entitled to specific performance.

In other words, a contract written on a bar napkin is still a contract, and an offer for commissions on April Fools' Day is still an offer that can become a legally binding contract.