BuddyPress Charges allows you to charge points from your BuddyPress users for certain actions such as sending private messages, joining groups, and viewing other users’ profiles. Simple & Easy-to-use – Your users will be charged and credited in myCred points.

myCred BP Charges Addon GPL Features:

• Buy or Sell Profile Access
  Allow your users to buy and sell access to their profile for myCred points.
• Messaging
  Charge or credit your users’ myCred points every time they send or reply to a private message.
• Group Membership
  Allow users to pay for group memberships. Keep the membership points for yourself or distribute them amongst your group members.