Doubt anyone would pay to list - especially on a new site - especially, especially if there's no good proof or track record of the site being able to actually sell the domains or attract buyers. And, even then, there's plenty of free/commission-based options that are far better established.
Also, IMO, there's only really 2 buyers of domain hacks; other domainers and end-users. Other domainers hardly need any help finding domain hacks. End-users wouldn't really go to a domain hack specific site; they would start their search based on their desired keyword(s) and visit the hack directly to see if it's for sale.