I recently visited a site that sold a membership for $49 usd and included 20 credits to apply to purchasing services offered. If you don't have a membership you can not use the site.
Then when you have used your 20 credits you can purchase more credits. Here is a scap of the added credits approach: https://snag.gy/pLcrOa.jpg
Can membership2 be used in such away ? I would like to offer a membership site that is usage sensitive or unlimited. I am not sure I really like credits but would like maybe to up charge the membership when they use the site more. Like a video site concept, say you get to watch 5 videos for your membership fee and when you watch the 6th video you pay extra. I know how to do unlimited but any ideas on adding a pay for what you use pre purchase or after the fact ?
A quick search of wordpress plugins at wordpress.org did not really show anything.