If you're a good writer, I'd probably pick it up from time to time. Start without paying too much if you can, get an audience, and then buy a specific URL. It really just depends on your quality of entertainment. In short, you simply running around pointlessly in a world, no matter how beautiful or unique that world is, is not going to be interesting. If your character is immensely likable, and / or actually comes across interesting pieces of plot, that's a different story. Feel free to interpolate a little. Friends from the game to write into the blog should also help.