I think this is little more than a 'placeholder' / cybersquatting site. Like many others, the site simply has drivel content with a few keywords and a 'hot' address. The registrant will make its money from advertising without really giving a sh1t about the site contents until such time as they can sell the domain name at a profit. If users freely contribute useful content (as on PPRUNE) so much the better for the owner.
The appearance of official military advertisements on the site is no indication of official endorsement. Most advertising, eg Google Ads, is syndicated out to 'relevent' pages automatically. Looks like a complete waste of electrons.