Unable to determine who shared the action
It is also possible that people share the action only visible to themselves. And even if people do share the action with their friends, it will still be impossible to check who has shared and who has not, due to the privacy settings of individual users.
Unable to find out who your fans are
i likeThe same applies to the raffle of a prize among all fans of your page. Only the new fans are visible (under the heading 'New likes' in the page statistics). The fans of the first hour (usually the most important!) cannot be traced. These two conditions of participation cannot be checked for the award ceremony and therefore many companies will probably only look at who clicked on 'like' for the message.
Risk of wasted money
Furthermore, you also run the risk that the campaign will not be successful. And since you cannot list to data advertise such a campaign on Facebook, you will be powerless to watch your failed promotion. And your 'prize' will be a waste of money.
No long term effect
There is also a good chance that your so-called newly acquired fans will quickly unlike your page after the campaign ends. That is not the beginning of a long-term valuable brand <> fan relationship. There is also a good chance that future updates of your page will receive little interaction. Until there is something to win again of course! The interaction per thousand fans (IPM+) is the most important metric for measuring how your content is performing and these types of campaigns will most likely not have a positive effect on this score.
like buttonThe right way to set up such a Facebook contest is with a fanpage app , where people can register via an online participation form. This offers important advantages. Here is a summary: