>you can't see Kim Kardashian's pictures, because 200,000 other people have already signed up to look at them. Try asking Kim to upgrade her account! (But no, you can't message her here.)

That is now how it works. People subscribe to more than one content producer which allows the aggregator the power to merge and reorder the individual streams. You do not pay for being displayed, you pay for being prioritized in the stream.