I think it’s important to know, there’s an older picture of David signing stuff, with his father-in-law WHO WAS THE FIFTH DOCTOR, holding a very similar sign behind David’s back. I don’t have the pic, but you can probably find it if you look a bit.
Muriel Fahrion, the creator of Strawberry Shortcake and Care Bears, was under a work for hire contract when she created them and as a result has received no residuals over the last 40+ years. If you like either of those properties, consider purchasing something from her website. She has art and cute jewelry!