2. Do not consider it as a source of income. Better make it as entertainment.
3. Risk management.
Example:
Your monthly salary is $250. Your cost of living is $200. You save $40, put the $10 in a betting site. Your pot is $10(100%)
Risk 1% of your pot. Set a goal to achieve(Ex. 5% of total). When you win, stop. When you lose, stop. Go back tomorrow. Repeat.
If you want easy money then go bust your account in one day. Happened to me a dozen times. Never again.
That is a good simple tutorial for who wants to play gambling in a smart way and don't know how to do it. Doing what you said I'm sure the gamblers won't lose money they can't lose and they will be always under control of the game. Anyway, we can't predict if doing this the gambler will have profit, as on long term he will be losing money slowly, because the house edge...