When you total the subscriber bases of 5 of the largest MMORPGs they hit a whopping 45,000,000+ users. As of 2002, the total population of Poland was 36,983,720.
Want proof? Here's a chart :) **
I picked these five pretty much at random to show a mix of free, paid, US and Asian. Numbers are rounded and are probably made up by the companies themselves.
** Of course, finding these numbers isn't easy. Here's the sources for each of these numbers. Ragnarok Online, GameSpot Article. World of Warcraft, Blizzard Press Release. Lineage I + II, MMOCharts.com. Gaia Online, GigaGames.com Article. RuneScape, MMOCharts.com.
Take that, Bob.