Don't buy points.
Learn to handicap.
Don't spend your time trying to make a profit.
It simply won't happen.
Before you think of making a profit, buying points or anything else that will take you down the Primrose Path, try to solve this riddle:
Grasshopper: "Master, why is it so difficult? It's only one side or the other."
Master: "You need to understand what you're looking for and why."
Grasshopper: "What should I look for Master?
Master: "You must learn to see before you can look."
Grasshopper: "See what, Master?"
Master: "The forest through the trees."