Please be a dear and avoid giving expensive prizes in your Facebook pages. In your eagerness to gather as much fans as possible and as quickly as possible, you resort to giving out expensive prizes for that. How sure are you that the fans you have are honest-to-goodness fans?
Facebook fan pages and Twitter accounts are all about customer engagement. Now that you have amassed so many fans, how many people are really liking and commenting on your posts? Mababa, no? Mataas nung kasagsagan ng pacontests mo pero now that the contests are over, are people still conversing with you? Kung tahimik na sila, you can bet your ass hindi mo talaga sila fans. Sayang lang budget mo.