User blog comment:Mira Laime/Update on our plans to bring Gamepedia and Fandom together/@comment-64.111.36.62-20190306010741/@comment-64.111.36.62-20190306021628

Product Identity: The following items are hereby identified as Product Identity, as defined in the Open Gaming License version 1.0a, Section 1(e), and are not Open Content: All trademarks, registered trademarks, proper names (characters, deities, artifacts, places, etc.), artwork, trade dress, and the names and game statistics for the following monsters: beholder, displacer beast, gauth, githyanki, githzerai, mind fl ayer, slaad, umber hulk, and yuan-ti.

Open Content: Except for material designated as Product Identity (see above) and the githyanki/githzerai, slaad, and yuan-ti bloodlines in Chapter 1, the contents of this WIZARDS OF THE COAST® game product are Open Game Content, as defined in the Open Gaming License version 1.0a Section 1(d). No portion of this work other than the material designated as Open Game Content may be reproduced in any form without written permission. To learn more about the Open Gaming License and the d20 System License, please visit www.wizards.com/d20.

The above information pertains to the published Unearthed Arcana book, printed in 2004. Wizards still releases content under the Unearthed Arcana name monthly on their website, and if you check their website for what is and isn't allowed under their Fan Content policy (which the 5e wiki fell under,) Unearthed Arcana content is not restricted from being reproduced. We might intuit that since the content uses the same name as the publication from 2004, and WotC has gone back to using the OGL for content since 5th edition, that the same applies to mechanics and such featured in the monthly publications, at least for class archetypes, which line up very similarly to the published precedent. It is not paid content, nor is it restricted according to the WotC official, published policy on restrictions under their Terms of Service and Fan Content Policy. You left several of my questions unanswered, namely whether or not your own website's additional content policies are available to the public. There was a post publicly made on the 5e wiki stating that questions regarding UA had been ignored when the ultimatum as to whether or not to remove content was enforced.