Rappelz wants their game to be your choice for the summer, and they've devised a straightforward way to encourage it: an event you enter via logging in. No random prizes, no ornate entries, nothing but the simple procedure of logging into the game's servers for prizes. And it makes sense that it would be called "Login to Win" as a result.
Running from July 7th to August 14th, the event will automatically award prizes to each character after you log in for at least an hour a week. If you log in for at least an hour for a certain number of days, you also get additional prizes, and characters who log in for a grand total of 35 hours during the promotion are eligible for a drawing from several nifty presents. It's a great way for Rappelz players to get a little added incentive -- after all, if you were planning on logging in anyway, logging in to win seems straightforward.