YCH stands for Your Character Here. An artist draws a scene and leaves one or more figures blank. You bid for a blank figure, and your character is drawn into it.
YCH auction
Bidding decides who gets the slot. Highest bid at closing wins.
Fixed slot
No bidding. Flat price, first come first served, usually several slots.
Adoptable
The design itself is the product. You buy an original character outright.
Raffle
You pay a small entry and winners are drawn. Cheapest way in, no guarantee.