I can't see why Apple would want to stop this, there is massive potential in getting customers to buy in to iTunes and then move on to other Apple products. I know there is potential for a fact - that is how Apple got me.
I was on Windows and needed a decent music manager, I tried everything I could find and went with the best - iTunes. I ripped all my music cd's with iTunes and was impressed with the way it worked so when it came to buying an MP3 player I got an iPod Mini.
I was more than impressed with my iPod Mini so when it came to buying a new laptop I got a MacBook. Things continued to get better, I got an iPod was really impressed by the syncing - having my photo's, video's, calendar all sync up perfectly and in my pocket.
Then I needed a new phone, got an iPhone and was blown away by the syncing - it worked perfectly (email, contacts, calendar) and took me all of 30 seconds to set up. I literally spent days / weeks trying to do the same with my old phone and Windows and never got it to work.
I reckon Apple will benefit from it more than Palm.