The things that actually decide whether a lead magnet works
Specific beats valuable
A guide to growing your business helps nobody, because it is addressed to everybody. A checklist of the eleven things to fix on a pilates studio Instagram account before spending money on ads helps exactly one kind of person, and that person will hand over their details for it without hesitating. The instinct to broaden the promise so it appeals to more people is the instinct that makes it appeal to none of them. Narrow the audience until the promise sounds almost too specific, then stop.
Why the trigger keyword matters more than it should
Comment-to-DM only works if the word is easy to spell, hard to type by accident and not a word that shows up in ordinary comments. Pick something long and people mistype it and never receive the thing, then conclude you ignored them. Pick a common word and you fire on everyone being polite under your post. Reuse a word from an earlier campaign and you deliver the wrong asset to the wrong audience. It is a thirty-second decision that quietly determines whether the whole thing works.
What to send at 0, 24 and 72 hours
Somebody who receives a checklist and never hears from you again is not a lead, they are a file transfer. The message at zero hours delivers the asset and asks one easy question. The message at twenty-four hours follows up on the specific thing the asset promised, which is the point at which they either engaged with it or did not, and both answers tell you something. The message at seventy-two hours makes the offer or asks for the call, because by then interest has either formed or faded, and waiting a fortnight does not revive it.
Be suspicious of the opt-in rates you read
You will see lead magnets described as converting at forty or fifty percent. Those figures generally come from a landing page fed by a warm email list, which is not your situation. A comment-to-DM magnet converts a share of the people who saw an organic post, and that share is considerably smaller and much more honest. A magnet producing thirty real enquiries a month from an engaged audience is working. Judge it on conversations started, not on files sent.
One that works beats four that half exist
Most people with four lead magnets have four unfinished funnels. Build one, run it for a month, follow up properly, and only add a second once the first is reliably producing conversations you are actually working. The limiting factor is almost never the number of magnets, it is whether anybody follows up on the enquiries the first one already produced.