Also, check what they have for inventory for the cards you'll be submitting.
If there's a card with lots of inventory and has listed prices of less than $0.75, it's probably not feasible to submit the card. $0.30 for them to process your card, and then another $0.25 for the sale of the card. $0.55 is your break even point.
I try to submit cards where the inventory is low for older items, or has a higher price point.
Looking at the YGs for this year, some have over 50+ available, so unless you want to sell for the lowest price and probably discount on top of that, your YG probably won't sell. For example, there's over 60 Matthew Tkachuk YGs. Priced around $5+, usually anything under $5 gets picked up.