Many bloggers have links to other social media sites such as Instagram and Facebook and Pinterest, and this makes sense if a blogger is looking to increase her visibility, with the thought of possibly making money from blogging.
I have an instagram account and I post my pictures there, but so far I don't have any followers other than a few family members. I'd like more followers. I know I will have to make more posts and just keep putting myself out there.
One platform I won't be using is Pinterest. A major investor in Pinterest is Rakuten, a Japanese company which invested over $100,000,000 in the site. This kind of financial input makes it hard to say that Rakuten is a minor player in Pinterest. Rakuten is the world's largest retailer of whale meat and elephant ivory. I'm a vegan for ethical reasons. I do not want to be associated in any way with whale killers and ivory poachers, and I imagine most vegan bloggers are not aware of Rakuten's interest in Pinterest because if they did, they would likely not want to use the service.