a socket works in in most basic form:

connect to site, read page
find one prticular line on the whole page
find two pieces of unique text on the line and save the bit in the middle.

Which mean there is only one way you could just change the link and it would still work... And thats if the site looks identical to the original.

If you want a hint at how different sites can look to a socket, bring up any webpage, even this one:

right click on a blank section
view page source

The text window that pops up will show you the bare code for the site, sometimes the information you may want isn't even on the page, but linked inside something else instead, similar to how a picture of words isn't recognised as word text.

Btw, good to see you've updated and I hope you know a little more for it.