1. When I add an item to Myibay list or when I actually snipe it, is the Visitor Counter incremented - if the Seller has included one via the Ebay listing?
2. When I add or delete an item in Myibay list or when I actually snipe it or cancel the snipe, is the number of Watchers (that the Seller can see for that item) modified?
Thanks

1. No.
2. No.

P.S.: The number of watchers is not modified no matter what -- you control this number when you click "Add to Watching list" only.