After a certain age, the count changes to decades instead of years. I am 7 and will be a while.
I have an individual account on Facebook and one for my website, but I am not a regular user.
I took a website class from one of the originators of Twitter when it first was created.
He was constantly updating his location and activity with his group.
I asked him why he would give up his privacy and if he really cared about what the rest of his group was doing.
He seemed to think that tracking all of their movements were very important to the group he was in.
I didn't understand it then, and I guess I still don't.
I will have to look into the differences between Instagram and Twitter.