Before the purpose why the owner create that is to socialized people around the globe but everything change when some people use this unto their businesses so they also adopt the changes and create more easy way for business owners and advertisers to promote their products on more convenient way by using their platform. We see how social media sites evolve and now we can see them adopt to the current changes and this is good for us as consumers.
But with the times, everything can change and function differently than it should, we don't stop it because if we try to stop this, we will be considered as people who are out of date. Like it or not, now many business people are among influencers, they see a good opportunity to promote what they have through influencers. We see now that there are so many promotional services (endorsement) that we cannot deny that it is one way of doing business.