Recently I looked at iSpy because I remembered their featureful program (never really used it so this is really just a perception) and since they are pushing AgentDVR a lot, I've looked into it a little. I'm not really sure if AgentDVR is open sorce. I have searched for a link to it's source code and haven't found one, but also AlternativeTo marks it as proprietary. I worry they have started massively misleading users, and that you said that they are heavily pushing monetization does not help.
Maybe you could check the original iSpy if it works the way you want, but I think that is windows only.
But to be honest, iSpy (as the organization/company) is very shady to me. As I have said above, the original iSpy program is open source, but just take a look at their Github repo: it's clean of any releases or tags, so you cannot find the source code for a specific version.