OK, the problem is that the free link returns just data for an image, so Job1.Getbitmap works fine.
However, the paid link returns both text and an image, so because it is not just pure image data, the .GetBitmap is failing.
This was easily determined by opening both links in a browser.
It appears there is some code on the paid server that is doing a redirect to the homepage (with the text and image shown) when you try to access the image directly - maybe a header needs to be set when trying to download the image?