This should be a page that lists websites such as communick.com that offer paid-subscription accounts.

It should not include websites that offer free accounts, because such accounts encourage abuse and do not generate any revenue, so will inevitably be poorly documented and serviced. The list should provide basic information such as price, whether there is a free trial period, the refund policy, and the geographic areas served (if restricted to particular countries). The list should also recommend a single paid-subscription provider so that a visitor new to, and completely unfamiliar with, the "[matrix]" system, doesn't have to figure out which provider to select.