[Hell Puppy]

In most cases there is not a easy way to convert people over if you're going from a system where you cant control the entry point to a new system.

Going from a CCBill affiliate program to one such as NATS or MPA is a good example. Those clicks hit CCBill first, then get redirected. There's no practical way to pick out that traffic and redirect it to the new tracking system with affiliate tracking info intact and translated.

The most honest approach you can do is disclose that the change is coming well in advance and/or run both in parallel for a while.

That's what we've done on sites we've converted from CCBill over to Fat Fucking Cash. The old links to CCBill still work. On some of the sites we've emailed the webmasters to tell 'em it'll go away in 90 days, but we're well past 90 days in those casea and I still haven't turned it off. They dont get benefit of new tours and such, but if those links are still out there and generating traffic, I'll pay for it as long as I can stand it.

I'll continue to encourage them to move over, but in reality will probably keep it around until it becomes impractical not to.

Ultimately though if a sponsor has told you to change links, and they've given you a fair amount of time to get around to it, it's ultimately up to the webmaster to go do it. Yeah, it's a pain, but in the case of a sponsor adding cascading billing, it'll be worth the effort as you'll see more sales.