So much tldr; I can't say what the biggest successes were of Foxpro, but for better or mostly worse, I was exposed to a use of Foxpro which brought a few hundr

So much tldr; I can't say what the biggest successes were of Foxpro, but for better or mostly worse, I was exposed to a use of Foxpro which brought a few hundred millions of revenue (and 20%ish percent of profits) based on it. There was a multi-level-marketing company based out of the Dallas-Fort-Worth area of Texas in the mid 1990s which sold 1/10th ounce gold coins in a pyramid-ish scheme that rose to significant fame in the "home business (MLM)" market. The compensation scheme was legit in that it operated as advertised. And indeed it made some marketing types very wealthy. The entire backend, as it was in those days, was based on Foxpro running on a Windows PC. I recall with amusement that the leader of that company invited me to review his binary tree calculion system to try to improve it. Foxpro wasn't actually the problem. The problem was a grossly inefficient linear system which couldn't manage binary structures with hundreds of braches and thousands of leaves. To be fair, this system was built buy a guy who was a used car salesman with no formal training. What he accomplished was astonishing, but it was also an abomination.