Great question! Generally speaking, for any connected entities, it is possible to determine the exchange rates between these. One needs to design and run a bunch of tests to determine how they are inter-connected.
Having said that it is far easier to find exchange rates for “how much (X%) would content production decrease because of increase in content consumption (Y%). Even for these, the change is so dependent on the type of content produced (Video versus Text versus Pictures) etc; demographic (US/ROW; gender, age (Teens versus rest), type of product (Social etc.) etc. As all of these are so different, it is hard to come up with a set of benchmarks that would be universally acceptable.