My site is hosted on WP Engine, will giveaways still work?

Yep but WP Engine have pretty heavy caching rules so you should contact support and have them add exclude rules for /giveaways/.  We have provided a template below.

Hi,

I use the KingSumo Giveaways which relies heavily on dynamic content.  Can you please add exclude rules for http://mysite.com/giveaways/*

Thanks

Posted in: Giveaways