I've got questions and I hope you guys could answer them.
I've just joined commission junction and found everything very good.

1)What is properly qualified as a pay-per-lead?
2)How long do they take to update the revenue earned from the action taken place(lead/signup/clickthru)?
3)Are they reliable?
4)Which kind of ads on their site are 'hotter'?
5)How long do they take to send a check?