A few networks were offering landing pages, but then they stopped. You have to make your own landing pages for each offer.
The hardest are zip and email submits because you have to hire a programmer to build you a website, create a database, manage the database queries, then create a program to mass email the zips and emails in bulk to your affiliate manager.
It's a lot of work, I think you should stay away.
Unless your LP doesn't have the actual input field and links to the aff. offer.
It was sarcasm. Obviously every single affiliate offer in the world has a landing page.
? You do realize you CAN get it setup like you mentioned. I have a ringtone offer where everything is hosted on my domain and I pass on the information to the ringtone company.