ebay pages leading me to spoof competition sites with pop up windows and locking out back button

[mark1sparky]

As per subject, how does ebay have these links allowed on there pages.

All of these where jumped to from an ebay item landing page.

http://www.dingit.tv/highlight/1450787

http://www.starcraftreplay.org/o/335?sid=6998&c=0.002950096&cte=Yh+omk28Bdhr8AOt6yqbCw%3D%3D&time_sl...

https://www.heroeshighlight.com/o/335?sid=6998&c=0.002950096&cte=Yh+omk28Bdhr8AOt6yqbCw%3D%3D&time_s...

http://smitehighlight.com/highlights

https://sc2highlight.com/o/335?sid=6998&c=0.002950096&cte=Yh%2bomk28Bdhr8AOt6yqbCw%3d%3d