The original Thors from 5 years ago were decent ... I know several hunters that have used them and like them. And I have an ODIN from that era that I still use and like. But the "Thor HD's" ATN started with 3 years ago? Are not hunting capable units IMHO. I had one briefly and it wasn't "done". On "white hot" there was no image. That was one of several problems. I called ATN several times and eventually they told me to send it back. There's a detailed review of it in my "practicing" thread.
I've also had an ATN PS-22, which I could never get collimated sufficiently to use it as a clipon, dispite sending it to ATN and paying them to re-collimate it. Perhaps they didnt' have a collimating table

So I haven't been impressed with ATN support, which has uniquely been "hostile" on occasion.
So, I know of zero hunters using the Thor HDs ... and I had one myself ... and I cannot recommend them for anything other than trying to sell them if you happen to get one involuntarily.
If you want a low cost thermal for hunting, look at the Apex line of the Pulsars ... they're the bottom of the bucket for hunting usable thermals.
https://www.hueyoutdoors.com/product/apex-xq38-2-2-8-8x32-thermal-riflescope/
They will stand up to .375H&H