I see this kind of thing on job sites and gumtree all the time::

Hi,

I need someone who can post my ads Online on eBay.

Please contact me at: andrew @ novachris.co.uk

I will pay you £150 plus eBay fees for each listing.
You will be posting 4 ads per week.
Earn £600 per week.
You must have an eBay account with +10 feedback !
Work from Home - Part Time Job.

obviously a scam but how what happens when you apply and how are they allowed to keep advertising on well known sites?