Have you used a blog optimization service?

I was curious whether any of my fellow WordPress bloggers have ever used a blog optimization service?

As my blog has grown, it has gotten to the point where I am constantly being contacted by companies and people offering these kinds of services, promising they can improve your blog traffic and help you to rank higher in Google searches. I haven’t hired any of them, but I’ve wondered at times if it would be worth it.

They are rather expensive, and many seem to want a monthly recurring fee to keep your blog “optimized”, which I kind of balk at. This month for the first time, I will actually meet the $100 WordPress ads minimum threshold and get a payout, so I definitely don’t make a lot of money off this blog. Occasionally I have done paid posts and links, but very rarely because I am picky about that kind of stuff and will only host things I believe in or that are directly related to my blog themes.

If anyone has used a blog optimization service, I would love to hear about your experience, and if there are any specific services you would recommend or warn away from!