Yes, integration between social media platforms has been a huge factor in determining why you should be on multiple platforms. Anymore, you can share and post between multiple platforms simultaneously, just as you mentioned, which makes things more efficient marketing-wise when you make your daily posts. Not to mention this introduces the potential for cross traffic between sites, so someone who may like you on Facebook but not follow you on Twitter, may be more likely to find your Twitter through your posting methods and follow you.Well it depends on what your doing with these social media sites, but for me I tend to mix it up a bit. I use Facebook, Youtube, Twitter, Soundcloud, and Instagram, which all have there ups and down, but I enjoy how Instagram links to my Facebook and twitter accounts so I don't have to post to those sites separately.