I am spending a lot of time these days talking to people interviewing in the valley, and what I'm seeing is that the norm candidates are subjected to is 7+ hours of 6-7 on-site interviews. Candidates have to go through all the interviews, even if the first interview has effectively ejected them from the process.
Compared to that horrid process, I don't believe I have to justify anything about my process.
But, if you read downthread, you'll see that we in fact did a lot to ameliorate the (bogus, I think) concern that we were incentivized to soak up hopeless effort from lots of people.
Think of the design world:
Potential client "A" asks multiple desperate artists to work on spec in hopes that they will get the commission.
Potential client "B" call you up and talks to you, sends you some napkin sketches and generally engages with you for an hour before asking you to do a design.
Both clients want you to do a design (test) but one clearly doesn't have any skin in the game. Assuming you're a decent designer, which client do you respond to?
What do you do to ameliorate this concern?