@Nathan Wolhendler We have checked the free trial with the currently released version on your site and it is working fine. We have already mentioned that here https://multivendorx.com/support-forum/topic/free-trial-setup-for-my-subscription-but-my-client-was-just-billed/.

Also we have checked the free trial with the plugin version that we have shared with you and there also the trial is working fine. Kindly check the video https://watch.screencastify.com/v/Gep6B8HgKGK0l9XtGovP.