I thought that relentless boosted raw production and only applied to the homeworld. In my game started under the monday patch, relentless adds 10 raw production to manufacturing in my first world and my mars. Even at 100% research I have 10 raw manufacturing production, plus modifiers (160% for 4 factories).
No support ticket, never been able to get it to work.
Also, the military manufacturing boost from Ruthless is also doubling shipyard production from "mars" - at least when manually set at the planetary level.
