Have you done anything with your profile? The first couple of ones ranking are pretty busy, the top one has collections and basically a blog with the guides.
She does not even have anything for sale and only 9 feedback in the last year. It has to be what she has done with the profile. I did not even know you could do all that but then I do not really use ebay all that much
I am thinking along the same lines but trying to work out what the trigger is for getting the noindex changed could be pretty time consuming. I find it hard to believe it is done manually that would be a bit crazy.
I have absolutely no use for this but now my brain is locking on what I need to do to get my profile indexed. Been swirling around my brain all day when I have been trying to get work done.
Probably going to do some experiments. @googlealchemist if you find or figure anything out post it in the thread....