How people are using blogger as social media

I had observed this year that many people have created their own blog on blogger because it is free and east to use.
In order to use it as a social media, they usually start with their name with blogspot.com as it's domain.
They upload photos,share life events and amazing things happening in their life.

How this helps them on social media?
When they upload their event or photos of a certain program,they share their blog's link on all social networking sites because almost all social network sites offer link sharing except Instagram.
Most of the people share same thing on all their social network accounts.

For Example:
If someone was on his friend's or his own birthday party.He would easily upload on blogger and share on all networks instead of uploading one by one on each social media site.