I think it would depend on the type of business you have and the type of customer you are trying to connect with. I have found google and FB to be good with our business. But FB takes DAILY contact to be worthwhile for us at least.Check out FB page and you will see what I mean. There are programs out there that you can use to set up a month or more of posts and just let it fire off messages to your FB followers

Hope this helps.... good luck