Do We really learn "English" words on Social Network

Today most of teens, parents and also elderly have an account on a Social Network like "Facebook", "Tweeter", "Myspace".
All of them have attracted millions of users and all of them was created by an American sofware architect or
students, this is why a lot of words on these social networking services uses "English" word.

As a result everybody know the words, "Join us", "Subscribe now", "Post", "Send", "Edit".
So we can wonder this question :

                                        Do we really learn "English" words on Social Network ?

And the answer is "Yes" we learn English words, but not Bristish English words and the use of these words in everyday language is not intended to teach English.

We learn words from American English, and these words are used for commercial purposes. In fact we learn few words, that encourage us to buy or subscribe for free, in this case many ads every days are sent to our mailbox to buy products that have no revelant to the social network.