So we can officially say internet became way too centralized.
Gallery? Use Instagram.
Communication? Only Facebook.
Microblog? Twitter.
Videos? YouTube.
Search engine? Google.
If any of these sites will be shut down, there will be problem for current internet users. They will need to set up new service. And R.I.P. these data. Try to use multiple services for this. You will lose only part if it will get shut down. At least Wikipedia won something once.
Yes there are big companies who we marked for doing one thing on the internet. But still, there are a lot of sites that we are using for and would not be just monopolized by this. There are a lot of sites for pictures, socializing or even for searching information.