I'll just repost what I put on reddit.
I think the flavour of Valley Grid is like this: sometimes your grip represents the availability of your resources and contacts (Professional Contacts, click to draw and take a credit. You're spending time to meet people, the cards that you draw reflect the type of people you're meeting). As you are breaking more and more Ice in Jinteki's servers, they're able to narrow down on your available resources and make them 'unavailable'. This is because they own nearly all of the businesses in Valley Grid, so the longer you spend in their server breaking their ice, the more they are able to screw your upcoming resources, and 'entice' people from not helping you out.