I work with a company that is relatively new to the internet (just over a year) and was hired on to facilitate their expansion. In the course of this year, we've built over 170 different sites for this company. We've gotten really good SEO results, and have managed to get top ten placement on literally thousands of keywords that actually matter (and several, of course, that never get searched).

Now that I feel we've got a pretty good handle on the SEO aspects of this company's business, I'm finding that doing more optimization only brings small results. (I'll get another search term to the top, and get maybe 5 more visitors per day, etc) I feel we've pretty much reached the limit, as far as the SEO aspect of promoting this company's sites, and I'm trying to convince them to undertake some other avenues like, affiliate programs, newsletters, and other such things, but am having a very difficult time.

The answer I get from the owner of the company is that he just wants "a few more" things done, which are SEO related. I've been working with this company for over a year now, and have a partnership stake in it. I've got over 10 years experience on the internet, while the owner of the other company couldn't even send an email a couple of years ago.

In short, the question is: How to you convince a client that there are more than one ways to promote a website, and that sometimes, a certain type of promotion has achieved it's maximum potential?

Thanks

Eric