I declined getting thanked in-print for supplying audio files for a release because I'm not a self-centered egotistical bastard...plus I didn't want to get prosecuted since I doubted the label got proper copyright clearance.
Many. None in the film music world. As a musician myself I am friends with tons of people who make records. So from friends being in the band. Contributing small parts on the record or some writing/arranging.
My favorite one was when I was thanked for use of my mobile studio, which was due to the fact that I always have very high quality sound systems in my cars. I was hanging in the studio with a band I was close with during the mixing process and they wanted to take the mixes to my car to see how they sounded.
I was quoted, although not by name, in the booklet for La La Land's release THUNDER ROAD: The Film Music of Jack Marshall. Writing about the THUNDER ROAD score a few years ago (possibly on FSM), I described the music as being "orchestral rockabilly." That phrase made it into the CD booklet, but the author stated that he couldn't recall who had coined it. I was still flattered that he remembered my description.
I worked at Decca / DG for many years and had a few nice booklet Thanks. I think my proudest ones are Morricone's Hateful Eight and Sakamoto's Playing the Piano (US release). All 3 Hobbits (ex-US Decca release) weren't bad either
Couple times in either the kick starter efforts by Intrada or a similar one by Kritzerland. The one that comes to mind quickest is Black Patch / The Man. Thank the previous one by Intrada, which I was mentioned, was the one with a Hitchcock movie soundtrack.