Planet Fitness runs this promotion for select clubs usually once per year around this time. Deal expires Dec 31 for my specific location.
Check if your location is running the same promotion here:
I get this deal every year it comes around and can say with 100% certainty that you do not get charged an annual fee, you do not get charged an initiation fee, and most importantly, you do not have to give them any bank account information. Simply pay $99 plus tax with cash, credit card, whatever, and you're set for the year, no risk of them charging random fees.
I post this thread with the expectation that we will get the multiple "planet fitness sucks" posts that contribute nothing to the conversation. While there is some valid complaint about their policies and certain facilities, it is my experience that the clubs vary quite a bit with equipment and how they operate. For instance the "lunk alarm" never sounds at my place, and free weight dumbbells go up to 75 pounds which is plenty for most people. Planet Fitness is generally a clean gym that the every day person can go work out. I will agree it is NOT for serious weight lifters. It's just simply not what PF is trying to accomplish in pleasing their clientele.
Example of $99 promotion at a specific club: