I don't see them selling anything, just a Patreon and some referral links. If that's considered some dark ulterior motive, then you also wouldn't be able to trust most youtubers (Veritasium, CPG Grey, MinutePhysics, etc)
There's a direct ask for support in the form of paypal donations right there on the linked page. He also funnels traffic to his youtube, where he has well over a quarter million subscribers. He has quite a cottage industry selling doom prepper news.
I'm well aware of the general quality (or lack thereof) on Youtube, but that's why I gave a few examples of good Youtubers that also use patreon/referral links. Point being, I don't see a good reason to specifically call out iceagefarmer for having vested interest in saying what they say