@WhiteFirDesign Not all WordPress security issues are in core or can even be dealt with just by updating WordPress. On a poorly configured server or install, even the latest version of WordPress won't help you. It's easy to make just a small slip and end up with an unwittingly vulnerable site. Or two tiny slips combined. A server side monitoring tool checking automatically that your laces are tied is a boon.

A cheap and efficient security monitoring service applied at the host level is exactly the sort of service which can benefit from economy of scale. With Sucuri aiming for $30/month per site, more entrants in the server side security market are most welcome.

PS. Paul Goodchild of iControlWP is running a launch special for his new Shield Central service (you control security settings for all your websites from a single dashboard - hurray no more logging into dozens of WordPress sites to set or alter security settings). Existing iControlWP clients will be grandfathered with free Shield Central. We're happy ManageWP users so we can't take advantage of the offer but it's a good one.