What I'm trying to determine, is - how much time is being spent mining the dev fee. Seems like it's a lot; literally every other time that I checked throughout the past few days - I caught it mining on his pool.
To answer your question, the dev fee is 10 minutes out of every 290 minutes. The exception case is on first start, where it mines for you for 10 minutes, then dev fee for 10 minutes, then you for 280, then dev for 10... repeat. The "first 10 minutes to you" is so you can reasonably tune your units without incurring dev fees.
If you are seeing something different, then it sounds broken. We should probably try to figure that out.
You said: "I will not trust a large farm of 100+ Z11 machines to a custom firmware that is leeching so much from me. Why is it mining your pool for most of the day??"
Likewise, I don't want a "large farm of 100+ Z11 machines" who cannot communicate in a reasonable manner. I've offered via PM and via discord. PM goes straight to my phone. Discord goes straight to my phone. A post here, does not go anywhere and requires me to check.. which then requires a series of delays back and forth which is not productive for either one of us.
The first step to me answering "why" in your environment is to be able to look and see what is happening on the license server side. That simply requires a Support ID (status page) from one of your miners that is having an issue. From there, we can work to resolve. I strongly suggest sending that in a PM here, or via a DM on discord because it is "private to your machine".
My oldest users have now been using my firmware(s) for almost a year now. Any time there has been an issue, it has been resolved in a mutually satisfactory manner. It just requires communication.
*EDIT*: Non-dev fee options are available, if you were not aware. 0 issues reported from any users w/ a no-dev license.
Thank you,
-j