It's a OK guide for when you could lure, you didn't speak of the Black Knights lure, mole lure, prayer glitching etc etc.
I personally wouldn't of paid 500k for this, mainly because I knew off all of these lures. You could still make a guide on the still unknown house luring which I know people who are making 1M+ for 10 minuites of attacking each other + a tiny bit of talking.
You could also try to write a guide about killing dragon trainers for their whips, making them have 4 items which will protect over a whip, before you reply with Mystic tops / dragon longs / Dragon battle-axes do not work. Their are other items which will give you a nice profit if you know what you are doing.