No RBR didn’t. They invested money into development required to improve the engine for Renault, including hiring Mario Illien. That was their involvement. Everyone wanted a way out of the relationship in the end, the rebranding was just the end of it.
Also my original post was quite arsey, just re-read it. I should drink coffee after a long morning before posting .
Christian Horner throughout out the beginning of that season was saying they were using the expertise within their team to make it better. The hate for Renault was clear and didn't want to give them much credit. There were many suggestions that they may have soon after branched the development completely to come up with their own engine.
The agreement as you say was that Red Bull were far more involved in the technical development and they wanted to make that clear.