I agree that online coaching for a beginner/intermediate is probably not worth the money. But, for someone that's been powerlifting for a while, it can be a good use of money.
I signed up with Mike Tuchsherer in May of last year after going about a year and a half (maybe longer) without a pr total. In October, I set a pr total by 11 lbs and hit a squat I'd been chasing for years. Not a huge pr by any means, but when you've been competing for a long time like I have, additional progress can become hard to come by. And, after years of doing my own programming, I really like not having to think about it -- just go in and execute the workout.