well charging to view content is my content merchants pro addon. buying paid subscriptions with credits will be an itemtype in vbcommerce. both should be discussed at my site
and yes, rewritten basically on how it saves credits... right now its kind of had an addon approach, where new features have for the most part been added onto the original code. now that there is a large bunch of stuff, i will revise how all of it fits together and simplify how you set it up. i basically never expected or programmed for some of the things that it is expanding into or what people want, for example micrologs for all earnings. also some features which are becomming their own major systems will be modularized and expanded on their own (I may even remove them from the main hack in favor of addon status, such as the bank, lottery or post award system, especially since those 3 tend to be used by less than the majority so may as well speed up the main hack by making them even more optional). that kind of stuff needs an overhaul of the entire system, and indeed the next major version of vbcredits will be 2.0

however, I havent begun development on it yet (beyond some notes) and dont expect to for some time; theres a huge list of stuff everyone else wants first