Everyone will receive 50 FREE credits, And is able to claim for more every 30 days. You should be able to try the app without the need to make a purchase.
Need more credits?
Purchase a package with no monthly commitment.
Only one, Cross listing an item to one or more marketplaces only deducts one credits from your account.
Credits will only get deducted when you want to cross list an item to another marketplace. And it will not deduct more than one when you cross list an item to multiple marketplaces.