Credit-based usage limits
Under Apps > Supercycle > Settings > Methods > Membership you can change your credit system.Settings > Methods > Membership. Pick Credits under Credit system and save.
On a product's Membership method, open an option to set its credit cost.

Our merchant Superlooper calls their credits 'Loops'!
Each unit added to cart uses that variant’s configured credit cost. If a member selects quantity 2 of the same variant, each unit is charged independently at the variant’s credit cost. For example, a variant set to 2 credits at quantity 2 uses 4 credits in total. Members set the quantity using the quantity selector on the product page before clicking Add to cart.