There's nothing complex in this - I give you my money, you give me fun. And that's all that bothers me.
Punk got the point. I've been programming since 1986 and if you don't check and double-check your code before running, you end up with malcontents. If you think your database can handle more data, you must check and double-check first before implementing extras. If you think your server can handle more users, you must check and double-check benchmark results on a similar server before expanding your game. If you can't afford this, it's better to stay small.