Facebook and other social networks are an example of a fair system. You post something and you get nothing. Everybody gets nothing. The money goes to facebook. Facebook created billions of dollars of value essentially collateralizing the work of all their users and selling it off to advertisers.
Always trending IS actually very normal. Bill Gates has been the richest man alive continuously for the last 20 odd years. He is a perfect example of someone who leverages and uses every competitive advantage he has to maintain the lead. Still, it doesn't matter that he isn't the best programmer, the best businessman, the best investor. It's the fact that he set out on a path at the right place and at the right time. Not only that, he continued to carve out his path moving forward.
Sweetssj's competitive advantage comes from the fact that she joined very early. So, that has allowed her to build up a large following over a long period of time. This is something that takes considerable effort and should never be overlooked. Because again, if it were, then we'd just go back to the "fair system" which you now understand is not what we want.
Capitalism succeeds because the people who hold the most amount of stake in a system will be incentivised to act in such a way that benefits the system and therefore their own stake. People have seen sweetssj post consistently regardless of rewards for a year. She is a reliable public figure to support, one who is not likely to take the money and just leave. On the other hand, new users who have yet to "earn" their reputation struggle because they haven't had the time to build their following. It now rests on them to do so, and fight for their chunk of the pie.
All this bickering STILL basically boils down to one thing, which is inequality. You cannot bare to see someone who has invested more of their time into contributing to the platform than someone else who has just joined but posts equally good content. You fail to acknowledge the importance of accumulating followers , trust and reputation. Instead you jump to conclusions about how this and that isn't fair and at the same time dismiss the only solution to fairness.