OP if the people you quote knew, they would never have sold bitcoin so cheap. No one could have imagined that Bitcoin would have such a bright future. I had a friend who got 517000 Hex working on a campaign. According to the market price at that time, it was sold at $0.00058. But after a few days the price of that Hex skyrocketed. Each coin is priced at $0.50. My friend goes crazy when he sees the price increase. Later I told him that nothing can be properly analyzed in cryptocurrency. And there I analyzed the ones given by the OP to my friend and he didn't regret it later.
But if they didn't sell the Bitcoin so cheaply, perhaps nobody would have ever bought them, and then perhaps the Bitcoin economy would have never taken off and started growing. I would not underestimate the intent of the people quoted here that sold Bitcoin for a cheap price. The only way for them to test whether what they believe to be true about Bitcoin is actually true, is to give Bitcoin away almost for free, but not for zero. Is someone willing to give me something in exchange for them even if it is only fun and experimental reasons?
And think about the next step: if the guy who sold the pizza talks to someone else and says hey, I got these 10,000 coins called Bitcoin for pizza that I sold, how about you give me that for 5,000 BTC. That spurs interest and people get excited about it. The least they will do is google it and find this forum and then dig into it. It was essentially a community and network building measure and the pizza story was perfect.
Even if the pizza story was deliberately created in order to pump the price afterwards and then get the message out because the pizza guy freaks out and can't believe what he just received for selling his pizza, you can be sure that the pizza guy alone is going to spread the message where ever the damn he can.
Whether the actions of the guys quoted here were smart moves or accidental exchanges, it helped to get Bitcoin where it is today.
I do know someone personally who actually did sell accidentally. He sold 30,000 Bitcoin for $1 a piece and bought a BMW.
This is no fake story! And he did indeed regret it later on.