Honestly I like the idea, just had a question. They are probably still going to be able to receive damage from both sides during war, seeing how they are a third side and therefore can't really benefit from friendly fire being turned off for them. If this is the case and they were to be killed by someone of the side they were bought out for, how would that be handled administrator wise? Would that count as an RDM or would there be RP consequences? I just feel bad for the poor bastards who would be in the faction who are going to get friendly fired constantly (Especially on this dark ass map lmao).
Honestly I could see this be more of a balancing factor as well for the weaker side, which would be a pretty great help. I also like the idea of having to negotiate with them in RP, this could be used to create a lot of cool events and moments. Each side could even get some of their members to "specialize" in negotiations to create more of an RP feeling and situation.
Only issue I really see is Garnet already has so much he needs to do in terms of what he has planned for MRP, and it seems like he's already spread out so thin having to develop for like eight Rust servers as well as DRP and TTT, as well as working on FiveM and reviving StarwarsRP. I just hope if this gets accepted it doesn't get forgotten about or get put on the back burner like so many things have been already.
Overall +1, I hope to see this implemented some time on the server.