Some people have a "normal" site with "normal" pricing and an "enterprise" site with different formatting, pricing, etc (for example it could have a search box, even if all the searching is just a google search anyway).

The corporate pricing could include a commitment to update some percentage of docs within 12 months of a relevant RFC being published or whatever.

Keeps purchasing happy, is a way for folks in the enterprise to get their employer to fund some resource and still gets it to mostly remain a labor of love.

I attend a conference that works that way. Essentially there are two conferences at the same time, with identical badges (no conference name on the badge itself), one of which costs about $800 and one of which costs about $3000 IIRC, if you buy all the special upgrades. Any company that pays the for the "corporate" conference gets listed as a sponsor as well :-).