According to some affiliates' reports...

• How many times do users buy and/or recharge phone card(s)
  per month:
  • 1            - 74% of all users
  • 2            - 16%
  • 3 to 4      - 6%
  • 5 to 6      - 2%
  • 7 or more - 2%
• How many times do users buy and/or recharge phone card(s)
  for long time:
  • 1            - 60% of all users
  • 2            - 17%
  • 3 to 4      - 10%
  • 5 to 6      - 6%
  • 7 or more - 7%
• How much time do users spend to choose and order calling cards:
  • 5 minutes or less     - 28% of all users
  • 6 minutes to 10      - 30%
  • 11 minutes to 20    - 18%
  • 21 minutes to 30    - 9%
  • 31 minutes to 40    - 6%
  • 41 minutes or more - 9%
• How much do users spend on phone card(s) per month:
  • $10 or less  - 47% of all users
  • $11 to $20  - 28%
  • $21 to $40  - 10%
  • $41 to $60  - 8%
  • $61 to $80  - 4%
  • $81 or more - 3%
• How much does a user spend on phone card(s) per month
  on the average:
  • In July - December 2008 - $22.0
  • In January - June 2009   - $34.3
  • In July - December 2009 - $17.3
  • In January - June 2010   - $27.1
• Geolocation:
  • USA     - 90% of all users
  • Canada - 10%
• One user was buying and recharging calling cards 18 times for a month.
• One user was buying and recharging the same phone card 14 times for a month.
• Most repeat users keep on buying or recharging phone cards of the same brand names during a month and even further.
• On the average, a user spends $25.5 on calling card(s) a month.
• More than one user spent maximal $350 on calling cards per month.
• Repeat sales are 54% of all sales.

You can compare these common data with figures on separate calling card - Continental card.