There has never been any policy against direct linking on Google. They only show one ad per domain, and you're allowed to use any tracking server redirects you like. If I remember correctly, Performics's search management service even used the same tracking domain as their affiliate network (now Google Affiliate Network), so in some cases there's no way of telling if it's an affiliate or an agency. One offer I run directly from an agency goes through the same tracking domain that all of their search ads use, after my initial server redirect, so there's no telling that I'm an affiliate there.
The campaigns I was running on my paused/banned account allow direct linking, and if they have a problem with one of those landing pages (regular ecommerce product sites, and legitimate subscription service websites w/ no shady trials or rebills), they're going to have to ban direct advertisers spending millions per month. Those campaigns are already up and running in my other account (linked in my MCC, even), and if that gets banned for the same illogical reason, they're on to yet another account of mine.