Just wanted to follow up on this thread after some back and forth with Hawke support.
I started by asking for the same info as in my original post in this thread.
Hawke responded by saying they have "complete" subtension drawings on the individual product pages, under More Reticle Information. They also said the thin crosshairs on their reticles are "about .20 MOA thick".
I pointed out that the subtension drawings I had seen were not consistent as far as which measurements were listed. Some had no measurements listed for the thin crosshairs, while several FFP scopes listed .18, .14, or .11 MOA for their thin crosshairs.
Hawke clarified that "only SFP scopes had thin crosshairs measuring .20 MOA @ 10x (equivalent to .22 MOA @ 9x), and that FFP models may have different measurements, including certain info that may be proprietary and not published". They also attempted to upsell me on the Vantage 30 WA FFP 4-16x50, which, shocker, does not list thin reticle measurements.

I'm not sure how much truth there is to the proprietary info claim. My gut tells me the support rep was just not very motivated to compile measurement info that was missing from their site.
At any rate, I'm throwing in the towel for now. If Hawke gets around to publishing the data I'm looking for by the time my airgun optics needs go beyond back yard pesting, maybe I'll consider them again. Otherwise, I'll probably look elsewhere.