The article says this isn't an issue for subdomains of established domains, but the issues it describes match what we experienced setting up a game wiki for Cyber Knights: Flashpoint at https://cyberknightswiki.tresebrothers.com/ -- almost a year of not having any pages show up in search results, even though we were getting good links to it and there were no better alternatives that should have ranked (we never started the wiki for this game on any centralized site; at most all they had for it was a placeholder page).
Only after months of making sure our Steam news posts were consistently linking to pages within our wiki did we eventually see Google suddenly open the floodgates and start connecting searchers with the info they were searching for.
I've built out highly-ranked content sites before, and none of what I'd learned from getting those started seemed to work with this wiki, for no apparent reason. Google Search Console showed plenty of pages on the wiki were indexed; it just wasn't displaying them. Seeing this post I fully believe the premise that there's simply an arbitrary Google Jail for independent wikis. That sucks for search quality.
Only after months of making sure our Steam news posts were consistently linking to pages within our wiki did we eventually see Google suddenly open the floodgates and start connecting searchers with the info they were searching for.
I've built out highly-ranked content sites before, and none of what I'd learned from getting those started seemed to work with this wiki, for no apparent reason. Google Search Console showed plenty of pages on the wiki were indexed; it just wasn't displaying them. Seeing this post I fully believe the premise that there's simply an arbitrary Google Jail for independent wikis. That sucks for search quality.