Im new to CJ. When I search for advertisers, it gives me their 7 week and 3 month EPC. Do I get paid per click along with per sale/lead?
CJ programs don't pay you per click -- EPC is a calculation of how much you've earned with 100 clicks coming from visitors.
No, you are not getting paid per click. Each adverstiser will show you if it is paying per sale/lead/action. The EPC is there to give you an idea of the CJ affiliates' success with that advertiser over the given period. Then, that advertiser's links also have EPC metric to show that given ads success. These are provided so that you can compare advertisers in similar categories and choose between links
Wouldn't it also be useful to see the rates on average per 1,000 displays? When I can only see the PPC rates it doesn't tell me anything about whether some ads are clicked 20 times more often...