Wikiwiki

Wikiwiki is a Japanese free wiki-hosting service that lets users set up and run their own wikis, offering design templates, sample wikis and a help forum for site builders. The service marks its 19th anniversary on the homepage, and its most-used wikis cover games and franchises including Escape from Tarkov, Nijisanji, Genshin Impact, Pokémon Sleep and Monster Hunter, with the homepage showing a running feed of wikis updated minute by minute across hundreds of titles.

Its ads.txt file lists 185 ad systems, 72 direct and 155 reseller, naming sales houses including ADPUSHUP INC., FLUX INC, Rich Audience Technologies SL, Smile Wanted and Dormknight Inc.