It's important to understand you can never lose money when you purchase a Lucky Card. You will get at least the amount you paid loaded on the card, guaranteed. However, you might win more! 

The amount you win is based on Lucky Technology Corporation's sweepstakes program. To read the full rules, click here

In summary, Lucky Card gives out a total of $2,250 in prizes every month. Those are randomly distributed across all "entries." Consequently, your odds depend on how many people enter during the month.

Prize Number of prizes
$1,000 1
$25 10
$10 25
$5 100
$1 250