If buying points is for suckers, is selling points easy money?

[Gaze73]

Say you like a fav -10.5 at 1.95/-105. You can sell 3 points to -13.5 to get higher odds, 2.47/+147. What happens if you do this with 1000 favs?

[Gaze73]

So In 3 days I've had 5 bets decided by the hook, 2 in my favor. You're telling me it's supposed to happen in 2-3% of games? I'm buying the damn hook.