Most Publishing Rebate Has Not Came Through?

I published a paid UGC limited almost a month ago and only received 4,950 out of the 15,000 published. I’m unsure if I was supposed to get all of it back, but I’m questioning how the system works, as it is a bit confusing. Do I need to make more robux than the 15K Robux published to get the 15K Robux published back?

My item did sell out in about 2 days. It had 55 stock and cost 250 Robux
Item Link: Cupid's Battle Card - Roblox

The amount of Robux you make back from the rebate depends on how many users are purchasing it - you can read more about how it works on the Guide page.

It’s still quite confusing. How much stock would I need to make it be for the base price floor of 135 Robux in order for me to receive the full 15K Robux back?