Proofreading, layout, and database indexing, none of which should cost $20,000 unless they're doing it all for customer.
The only thing these journals have to offer to make it worth more is their prestige, and only because it's recognized in the academic community that getting published by one of these journals makes you important enough to justify your $200K income.
It has nothing to do with that actual cost of making this research available to the public, which is next to nothing and can be included as part of the grant to the researcher (and sometimes is as part of a publishing fee).
Services like Pandora need access to ALL music to be functional. The listener should be able to look up any artist - popular or not - and find them on Pandora. Limiting any service to just the labels the service makes a deal with is detrimental to the service, the listener, and the artists. It only benefits the publisher - although if people turn away from a service because of its limited roster of artists, then it doesn't benefit the publisher either.
Of course, they don't really want more money from Pandora. They want Pandora to go away, so that something like Spotify can be more popular (since the labels have a stake in Spotify).
I wouldn't be surprised if The Office lawyers licensed every one of those references - not because they had to but because they think that's how it should be done, and anyone that references The Office should do the same. And their reasons are always "to protect us from lawsuits."
Great system if you can afford it (but then again, they only want people that can afford it to be in the game).