Dave Naffziger's Blog

All three major PPC companies (Google, Yahoo & MSN) distribute promotional codes for new accounts. Of course, these codes can’t be found on coupon sites - their distribution is tightly controlled.

However, it is easy to find the promotional codes. There seem to be two primary sources:

• Outsourced SEMs. Google gives its AdWords professionals coupons that they can distribute to new accounts. I think these typically are around $50. I think you need to give account access to the SEM provider for this to be valid.
• Hosting Companies. I still maintain a 1and1 hosting account and they provide $100 worth of coupons ($50 MSN, $25 each Yahoo and Google). I have the 1and1 Home package which costs $5 /month. I’ve seen forum posts that GoDaddy provides coupons as I expect do most other major hosting companies.

I’m pretty sure that you need to have a new (<14 day) account to qualify for the various coupons.

Where else have you found the promotional codes?