When I first saw the $7.50 royalty, I was thinking he’d make a decent payday as long as they sell 10K-20K of the things. Very surprised they sold 100K seems like a lot for the mid-80s for a relatively niche Mac accessory.
A little later, the LaserWriter printer became the first generally affordable laser printer. But it was affordable only if you were rich or had a business case for it. The sub-thousand dollar laser printer took quite a few more years.