Can't you make the same complaint about any auto-update functionality in any software? Even if it's BSD licensed, you're still counting on whomever has authority to push an update to not push malicious code.
This doesn't seem to have anything to do with the fact that his code is proprietary nor his monetisation strategy, so why are you singling him out for those?
DRM/monetisation - the product as of my comment didn't seem to acknowledge the open source works compiled into the binary, and I didn't think that was a good look for someone with the authority to push out malicious code.
> The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
It's up to a court to decide what "copies or substantial portions of the Software" means.
Personally, I've always very much interpreted that to mean both binary and source.
Personally I would still include it in both, but I always had the impression that MIT was looser than BSD-2-Clause about this. BSD-2-Clause explicitly states that binary distribution needs to include the notice in "the documentation and/or other materials provided with the distribution", and I have a feeling that the license authors might've had a reason to want to be explicit about it.
Also, AFAIK most understandings of MIT, BSD, and Apache 2.0 licenses require you to acknowledge the copyright holders of the source code you compile into your binary, even if the licenses permit binary distribution. I can't find your "Copyright (c) 2018 Tokio Contributors" or "Copyright (c) 2014 The Rust Project Developers" that I'd expect based on `strings TabNine | grep github`. Maybe you've got a lawyer that suggests otherwise? Your plea of "trust me, I have good hygiene" carries less weight when I have to `strings` your stuff to know what shoulders of which giants you're standing on.