Once you’re a little more sophisticated, domain redirect could be worth a shot. Even though it’s a bit more costly than pop, it can still be regarded cheap, it converts well or even enables a more precise focused on. Broad or exact keyword matching allows you to target users who have already shown interest in a given product. If someone was about to search for a new phone in a web electronics store and gets redirected to an ad providing a chance to win one – it’s highly feasible they are going to engage.
Also, no ad creatives or pre landers are required and the site visitors volume is big enough to scale.