Yes, we update it once a year to keep it relevant. We’ve actually updated it twice in 2018 due to some of the bigger changes in the marketing automation landscape this year. Notably, we’ve included a few new vendors that have become quite popular (Prospect, SendinBlue) and removed some of the older ones that were declining in popularity (e.g. Eloqua).
A lead magnet (a.k.a. an optin bribe) is something amazing that you give away for free in exchange for an email address. This doesn’t have to cost you anything to create; most lead magnets are digital materials like PDFs, MP3 audio files, or videos that you can create yourself at minimal or no cost. It can be absolutely anything you want, so long as it provides value to your visitors for free.