They had told us that they wanted to integrate with us - then they expressed interest in buying us and had us come in for several meetings with their tech staff so they could ostensibly perform some due diligence - and had us go through our arch and demo for them and explain the vision and the features we had - claiming that they'd be forthcoming with an offer... then ghosted us after and it became clear they were then trying to create their own system based on our archtecture and what we shared with them.

Recall that scene from (was it silicon valley) where they did the whole thing on the whiteboard at the VC - where they stole the idea from there... yeah that happened to us.