I don't know if this is the right forum to ask but moderator, feel free to move it

Recently I have encountered a site that has some check boxes and when checked you subscribe to some affiliate services . I would like to know if it's possible to do this automatically or if he has to enter all the data by hand. The site that uses this principle is http://www.moneyreign.com

I want to emphasize I'm not going to use this technique for 'tricked' affiliate money but I would like to know about the principle that stands behind it . How does this site manage to get the subscription information into the forms of his affiliate programs. Is it possible to do something like this automatically or does he have to insert all data by hand.

Thanks in advance ( and sorry for the rusty english )