PreVue Channel also had an ad-delivery platform which served ads for the upper half of the prevue channel. The system was completely “headless”, using an A4000 that you could dial into, and upload new ads etc.

I developed that in 1993 — I think it was called “AdVue” commercially.

It was able to slideshow/carrousel the uploaded IFF/ILBM files or JPEGs, as I recall. I somehow managed to write a dithering algorithm for rendering as HAM8. I don’t recall how I chose the palette seed colors, as I didn’t know proper clustering algorithms back then.

I also somehow pieced together the “BBS” like Zmodem/Xmodem/etc. functionality for uploads. Long live Public Domain sources. This was pre GitHub ;-)

I’ve heard that the system was used for several years in both USA and perhaps Central and South America.

I lost contact with the company after going back home to Denmark.