No. But the fact they are dealing with Steam (unfortunately) usually says a lot.
That they dare to want more people to play their game, which needs to run always-online regardless, and its success is directly related to the amount of people playing it at any point in time? ... It soulds like they're on the better side of the deal, especially since they don't have to pay Steam anything whatsoever - all microtransactions are handled by them, so they shouldn't pay Valve anything.
But sure, you can
pick to see the worst in a decision to optionally include Steam client for people who want to use it and its features.