Maybe I'm confused with the timeline but the actors involved, but:
> The company offered a managed version with its own proprietary additions
Doesn't sound like open source to me?
> The company offered a managed version with its own proprietary additions
Doesn't sound like open source to me?
So using open source on someone else's computer technically fulfills that requirement, without completing some of the reasons why the requirement exist (vendor lock-in in this particular instance is particularly laughable).