Personally i don't understand the need for longer periods on cookies given that cookie length really doesn't make any difference to the amount of sales generated.

Ive experimented with cookie lengths on and off for the past few years and trust me when i say this, whether its a 3 day cookie or a 3 year cookie, the amount of sales doesn't increase significantly for any affiliate or program owner to warrant them caring about the cookie length.

Its just something else that affiliates bitch about and program owners manipulate to try and get more affiliate traffic.

Regards,

Lee