Probably the only solution. But the penny has been deprecated so it will have to be a nickel.
replyOnly copper was deprecated. Real $0.01 absolutely exists in your bank etc.
replyAnyway, marketers see a popular site like a physical billboard, where they would pay thousands a month for their message to be seen by thousands of people. If you made it cost pennies to post, and a few more pennies to boost and astroturf, AND that the post would be seen by millions of people, they'd say "By Grabthar's hammer, what a bargain!!" and order a hundred more per day...
I think pay per account (like the Metafilter model) would be better. If you charge $10 for lifetime access and ban slop-posters, it quickly becomes expensive to be a slop merchant
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