Yes - Sometimes activity providers don't open up all of their available spots for registration on VersatileKids (ex. Their maximum class capacity is 15 but they choose to open up only 5 spots for registration through versatilekids.com).
If the class or camp you are looking to enroll with no longer has any spots available for registration on VersatileKids, you can make a request for additional spots by clicking on the "request for additional spots" link, located on the same row of the class you are trying to enroll with. Through this, you can send a message to the provider requesting for additional spots. In many cases the provider may be able to accommodate you!