There are no concrete plans to host this publicly right now, though the introduction of Workspaces would certainly support the idea. The tool's current Third Party Module implementation is designed to allow each user the ability to modify their copy of the project to support the Third Party Modules they use or offer publicly or privately.
Workspaces is also planned to have a module pricing API that the tool can be updated to leverage. The tool was built to be completely standalone, allowing integrators and end users alike to run the project offline with all of the module and pricing information readily available.
A flat discount rate is already exposed as a session property within the tool. Simply set session.discount to the percent discount you want applied. For example, session.discount = 10 would apply a 10% discount to all module selections as well as apply the proper support discount.
Please note that this tool is not meant to be a replacement for quotes from Inductive Automation - Workspaces will fulfill that role in the near future. Rather, this tool is meant to document existing or hypothetical deployments including the ancillary items that interact with Ignition.