Facebook ad failures

[dontbejello87]

I'm trying to do an email submits campaigns that are successful on Facebook. I have tried a burger gift card, wendy's gift card, and an iPhone giveaway. In which none of this seems to do a good job and I'm just wasting money and only made I would say half of what I put into ads. Before I waste any other dollars spent. I just wondering if anyone else has any advice for max bounty offers that have worked for them on Facebook.