On my Bonvoy card, spend $209 or more on CLEAR+ membership in one or more purchases, earn $50 by 3/30/26
Although, I don't know how big the intersection will be between people who read this thread and people who don't already have CLEAR comped or reimbursed from elite status or credit cards

and for some who can't get it for free but have access to discounted pricing, you'd have to see which way saves more, and/or have additional family members to hit the $209 threshold...