I found a magazine advertisement from Tab's "Mindsticker" era and had to post it.
No idea why I'm so engrossed by this whole thing, but I am. Look at the completely vacuous expression on the woman's face. "I have no thoughts in my mind. Why should I? I'm a Mindsticker, not a mind user. Wow, look at this fascinating stick. It reminds me of - well, me!"
Also, apparently, two TV commercials were made. Here's the other one. A little jauntier, not quite as unsettling as the reproachful twinkle-harp one, but still plenty nauseating. "She's stuck! Stuck in his mind! She's a Miiiiindsticker with a goooood shape!"
Yeah, she's stuck all right.