I have a subscription. I've not found it quite as useful as I thought it would be. I guess I just don't do that much hiring of contractors. I don't recall getting any sort of spam or other unwanted email out of it however.
I did file a negative report on one company and the experience wasn't particularly pleasant nor did it have any affect on the non-responsive landscape contractor.
I am an independant contractor. I know my area pretty well. I do not show up on AL. Of the ones who do, I would recommend about half. 25 percent are so-so, and 25 percent..NO WAY IN (&^*$%&$&