I can't remember if epn ask to see a website, but most do - so I would say yes.
I got into epn at the very beginning, but know that they have tightened everything up - so I can't help there.
I do know that they are available to use on the following networks though (last I heard) - so maybe try joining through them.
Pepperjam Network
Mediaplex
TradeDoubler
Affilinet
but I have not joined those - so I can't confirm.
Mainstream sponsors payouts can vary hugely and there are different types - here are some random ones from one of mine:
Lead: $15.00 - $18.00 USD
Sale: 6.00% USD
Sale: 10.00% EUR, 5.00 € EUR
Sale: 3.00% - 6.00% USD
Lead: 4.00 € EUR
Lead: £43.00 GBP
Sale: 5.00% USD
Sale: 5.00% USD
Lead: 2.00 € EUR
Lead: 6.00 € EUR
Lead: 3.50 € - 4.50 € EUR
Sale: $50.00 USD
Sale: $75.00 USD
Lead: $2.00 - $25.00 USD
Some do Performance Incentives also.