This past Saturday - days after porting my number from Sprint to ProjectFi - I got a bunch of surprise texts from various stores, my credit card company, pharmacy, etc., saying I'd unsubscribed from their texts. This was news to me!
Today I found the answer: m.reddit.com/r/ProjectFi/comments/3sx5j0/woke_up_to_mass_sms_unsubscription_today
Today I found the answer: m.reddit.com/r/ProjectFi/comments/3sx5j0/woke_up_to_mass_sms_unsubscription_today