While most SEO firms will charge a flat rate or monthly fee, they are motivated to complete the process as quickly as possible and move on to the next client. They have no incentive to make sure you succeed and no penalty if you don't.
A true partner shares in the risk and in the reward
Because each site is entirely different and requires a custom plan of attack, each of our proposals are customized based on the needs of the client (no "assembly line" approach). Incorporated into each contract is our "Incentive Based Pricing." We make a base consulting or optimization fee while a substantial remainder of our contract is only paid if we produce the desired rankings. Yes we have to be mighty confident in our methodology and track record to offer this to our clients. We spend a lot of time on each proposal so that everyone is clear on the "rules of the game" but this is the end result:
We are incentivized and share in the risk as a true "partner"
We are incentivized to spend as much time as necessary to get the results
We are motivated to make sure the necessary changes are done as quickly as possible
We are creative and ready to fine tune our approach if necessary
The client can better gauge that the optimization contract is a positive ROI
The client gets a heavily discounted rate if we don't produce
Download more information on our offerings here (pdf).