Very fresh essay. I particularly agree with the comment that if you love the distribution channel you use, the work gets much more enjoyable, and you get better results. I def started feeling more fun once we began doing more writing contest BD. Re: using ads to check which mobile game features users are interested in - in B2B, it's similar. The difference is that some major salesman (typically the VP of Sales or the CEO) goes to the client, speaks about the potential roadmap, and checks what resonates with the client. Once he sees that some particular feature gets a lot of interest, they pass it on to the engineering team, which works with the interested client on the implementation.