Weaker competitor domain has somehow had featured snippet google spot for a month. Any insights?

So…the owner of this site has outranking me for the featured google snippet slot with a SIGNIFICANTLY weaker backlink profile.

I'm curious as to how they're managing it, or rather, if anyone here knows what additional factors might go into the Rich Snippets. Our rankings have fluctuated between each other for the top 3 slots, but the competing domain has been glued on top for the feature for about a month.

Any insights would be appreciated

Stats

Their 3rd party prefix…

Weaker competitor domain has somehow had featured snippet google spot for a month. Any insights?