@bryankoci using ‘comment with KEYWORD’ will work, but yes, Meta may see that as engagement baiting and penalize your account. You can still use it, but don’t abuse it ;)
If you’re going to use it, use post-specific triggers (so you can have specific keywords), and you can also use keywords + a number (something like INFO1). This avoids unintentional triggers.
My favorite way though is to use post-specific triggers (that work only on one specific post), not use any keywords, and just invite people to comment to get whatever I’m offering.
So, if I’m offering my Spaghetti recipe, I could say something like ‘comment with your favorite pasta and and I’ll send you this recipe’. This promotes a more genuine engagement and avoids engagement baiting triggers.
Hope this helps ;)