I am in the early stages of looking for that elusive product-market fit, so all feedback is appreciated. I will email you off list.
I did a physics degree originally. Then my first job was in writing OR software (in FORTRAN!). PerfectTablePlan doesn’t fit into the classic OR mould and isn’t amenable to any of their standard approaches (e.g. linear programming) so I wouldn’t really consider it OR software. Also the solver is only a small part of the whole.
Keyword Funnel does have a tricky optimization problem in it. Partitioning keywords into adgroups automatically. That was the most challenging and fun bit to write. My first attempt to an hour plus to partition several thousands keywords. It can now do it in a few seconds. I don’t think there are many other pieces of software that can do this. Google has an online equivalent. But it is much less flexible.