I think that within working on the contents, reading (and learning), interacting and so on, I am more or less spending 1/1.5 hour per day on Hive (I mainly use Ecency).
Anyway, some days it's less, some days it's more. One day, I spend several hours here because I got so engaged in one constructive and productive discussion that I literally worked with the Ecency page constantly open and updating to keep the conversation ongoing.
I consider it an investment: for my knowledge, for knowing deserving people and for building a form of income as well