I believe San Diego Magazine trademarked "San Diego" quite a few years ago. IIRC the trademark included the specific font used by the magazine on its cover. If they had tried to trademark the phrase without limiting it to a magazine with that specific font, I would hope they would have failed to get the registration. I haven't looked at the filing in this case (life is too short for this kind of bullshit), but I would hope it's limited to "THANKYOU", all caps, no space.