That "hour" is obviously not a literal hour -- once you factor in the A/B testing, analysis and recommendations I'd expect you'd be taking up at least a day (if not two) of Michael's time.
It clearly says:
"...you get an hour of my time to discuss..."
This is just the human-to-human interaction portion of the plan. The test cases and reports are likely running all month. I have a similar retainer program where each client gets a day of my time per month for a pre-paid fee, in which I address specific concerns they have. That doesn't mean I only work one day per month on their systems as there are scheduled cron scripts and monitoring that run continuously.
His explanation could be worded better.
He links to Visual Website Optimizer[1] as the A/B testing tool he will use. I haven't used VWO personally but based on their features page it's a point-and-click to change some visual details on the website. Install a javascript link and good to go. Again, haven't used the tool but doesn't seem like much work to me.
