The artist determines the collector's only drop and its mechanisms in question. For example, one of the requirements may be that you will need to hold specific NFTs that the artist previously dropped.
Every collector's only drop may be different, and it's always best to visit the drop page(made live the day of the release) to be updated on the requirements to verify if you'll be able to participate.
If you have any questions, please do not hesitate to reach out to our Collector Support team here.