Start the no-card Pro trial now (an account that has published)

For a free account that has published and never had the trial: starts the 7 days now (the dashboard's button on a free limit). An account that has not published yet is told its first post starts it — except from: "bizcard" (the dashboard's approvals-and-team card) for an account the server finds business-like (3+ networks connected, 2+ brands, or a team seat wall): it starts before the first post, with the same once-per-person rules. 409 trial_unavailable with reason: not_posted_yet, trial_used, same_person (another account of the same person had it), card_trial_used, paid_plan, off.