Ok so on the first line of code think of it like creating a prefab,
You are creating the entitlement which is supposed to be static.
Whenever you design ANYTHING regarding paid items, whether its a simple counter of “currency”, or checking if a player has paid the VIP pass, you will gather information from THAT entitlement you made in the 1st line
cornseedpacket := class(my_island_entitlement):
Now in the 2nd line you provided, that’s plugging the entitlement you made inside an offer
An offer is responsible prompting the player to make a purchase
This is an example of an offer being used in-game: