With a stock, it pays what is called a dividend (used to do this anyway). That means you get payouts forever based on the ongoing revenue generation. With these coins it's a little different. The pot gets bigger based on fees coming in, but once you cash out the coin, you get your payout (1/5,000,000th of the fee hoard at the time). Your best payday is a game of chicken between you and the Grim Reaper. But you can trade them like a stock, so someone might be willing to pay you much more than 1/5000000 of the pot, if it looks like the pot is growing astronomically. Since many stocks don't pay a dividend (which is a scam IMO) this is at least as good as that because it has a concrete contractual backbone.