Tipping is easy up here - customary tip is 15% & our sales tax is 8%, so just double that & you have your tip
Seriously - the last CCBill account I signed up for had a number of 658090. Now, we know everyone doesn't get a check each week from each account, so let's say that 10% of them got a check last week:
65,809 checks x $0.08 = $5,264.72
Fuck - even if only 1% of the accounts got checks, that's $526.47 - that's a nice chunk of change for us to pay for the privlage of having our checks mailed to us.