NEVER link an AdWords campaign to a domain where you don't have complete control of the content on it, unless you're ok with getting a lifetime ban. The problem with direct linking to CPA, or even CPS offers, is if for any reason, at any time, even years later, that page violates any of their rules, they'll suspend you, and then later upgrade that suspension to permanent or lifetime as you didn't make the page compliant.
Contrary to popular belief they don't ban you just for being an affiliate, rather for bridging, or otherwise not providing 'unique' content. As long as you aren't doing anything overtly shady, you can usually get by doing affiliate offers using your own sites, especially if you don't have an affiliate link on your landing page (sending the offers through email, white labelling, or doing host and post etc.). If/when their compliance team have a problem with your site, since you control the content, you can eventually get your suspension lifted, through a series of page edits and appeals.