Hi Maina, I have checked the social sites recommended by you. May be itis important to update on your article that Delicious no longer accepts bookmarks as it is now bought by Pinboard. Most of these social sites are being bought off and may discontinue their programs. May be you can even dedicate a new post for that. Otherwise, great piece of work there.
Social media has allowed for mass cultural exchange and intercultural communication. As different cultures have different value systems,[vague] cultural themes, grammar, and world views, they also communicate differently.[citation needed] The emergence of social media platforms fused together different cultures and their communication methods, blending together various cultural thinking patterns and expression styles.[citation needed]
Checking updates on friends' activities on social media is associated with the "fear of missing out" (FOMO), the "pervasive apprehension that others might be having rewarding experiences from which one is absent".[100] FOMO is a social anxiety[101] characterized by "a desire to stay continually connected with what others are doing".[102] It has negative influences on people's psychological health and well-being because it could contribute to negative mood and depressed feelings.[103]

You can also create your own products with digital and physical. Though I would recommend to begin with Digital products (like eBooks, courses etc.) because they are easier to create and promote and take less amount of money in the beginning to develop the products. For instance, you can list your eBook on Amazon Kindle or ClickBank and then promote the link of your eBook on different social media channels. And once the sales start rolling, you have to do nothing but collect the payment (being a digital product, you can sell it N number of times!).

Social media may have been influenced by the 1840s introduction of the telegraph in the US, which connected the country.[10] ARPANET, which first came online in 1967, had by the late 1970s developed a rich cultural exchange of non-government/business ideas and communication, as clearly evidenced by ARPANET#Rules and etiquette's "A 1982 handbook on computing at MIT's AI Lab stated regarding network etiquette," and fully met the current definition of the term "social media" found in this article. The PLATO system launched in 1960, which was developed at the University of Illinois and subsequently commercially marketed by Control Data Corporation, offered early forms of social media with 1973-era innovations such as Notes, PLATO's message-forum application; TERM-talk, its instant-messaging feature; Talkomatic, perhaps the first online chat room; News Report, a crowd-sourced online newspaper and blog; and Access Lists, enabling the owner of a notesfile or other application to limit access to a certain set of users, for example, only friends, classmates, or co-workers. Tom Truscott and Jim Ellis conceived the idea of Usenet in 1979 at the University of North Carolina at Chapel Hill and Duke University, and it was established in 1980.