If you have a big spend and you are just passing through money from the client to Google put it on Amex or something with rewards and you'll be able to get all kinds of cool perks.
Thanks for the reply. Its not so much that we want the credit terms on every account because of the credit itself. Its more because its much easier to have a consolidated bill at the end of the month. In addition with the credit card google tends to bill at random intervals making the accounting on 30+ accounts a nightmare.
it would be very nice if they could hit every 5k or so after a while
skibum, just contact adwords support and they can increase your account billing threshold to a higher limit. It requires them to assess credit worthiness etc, but is definitely possible. Otherwise it does become an accounting nightmare with loads of mini-debits.