Jackpot Joy Affiliates have made some adjustments to both their Terms and Conditions as well as their FAQ page.  The terms update is in regards to player restrictions from the US and Australia while the FAQ change makes mention of their new affiliate cookie length.

UPDATED TERMS

JACKPOTJOY does not knowingly accept bets from residents domiciled in US ?territories or Australia, or individuals using US issued bank cards. For full details, please read the Player Terms and Conditions on the JACKPOTJOY website. JACKPOTJOY will not knowingly pay commission monies to affiliates generated from players identified as wagering from US territories or Australia.

3.2 THE FOLLOWING TYPES OF SITES ARE NOT ALLOWED TO PARTICIPATE IN JACKPOTJOY: Those that are aimed at children, display child pornography or other illegal sexual acts, promote violence, promote discrimination based on race, sex, religion, nationality, disability, sexual orientation, or age, promote illegal activitiesactivities, including knowingly targeting advertising of JACKPOTJOY to residents domiciled in US territories or Australia or individuals using US issued bank cards, or violate intellectual property rights.

Summary: This is a typical territory exlusion except that, due to US laws, US credit cards are also excluded as payment methods (even if you live outside of the US).  The second portion of the term update states that it is against their terms and conditions to promote Jackpotjoy towards the US market as well.

UPDATED FAQ

The cookie length is 9999 365 days for all affiliates, so players have a very long time to convert from free player to real money players.

Summary: Cookie length is highly debated by many affiliates.  365 days is a very long time to persist cookies.  Some affiliates like this method while others disagree.  You be the judge if this is for you.