20 $ for 1000 files download seems to be good rate at present. Also they have a referral program. 10 % of your referral earning.

One things is not sure for me what is the payment method ??

and more important rates varies from country to country

We pay 2 dollar for 1000 downloads from the following countries: Australia, Austria, Belgium, Canada, Denmark, Germany, Great Britain, Greece, France, Finland, Ireland, Italy, Netherlands, Norway, Sweden, Spain, Singapore, Saudi Arabia, Portugal, USA.
We pay 1 dollar for 1000 downloads from the following countries: Brazil, Czech Republic, India, Japan, Malaysia, Mexica, Turkey, Poland, Russia, Ukraine.
All other countries are paid $0.1 per 1000 downloads.