> Not adding the domain to Google Search Console immediately. I don't need their analytics and wasn't really planning on having any content on the domain, so I thought, why bother? Big, big mistake.
I'm not particularly familiar with SEO or the massive black box that is Google Search - is this really as critical as the author makes it seem? I have both .lol and .party domains, both through porkbun (and the TLDs seem to be administrated by Uniregistry and Famous Four Media, respectively), and both are able to be found on Google Search. It seems like this preemtive blacklisting would be the result of some heuristics on Google's end; is .online just one of the "cursed" TLDs like .tk?
Yeah I'm guessing the TLD was the main signal, based on other comments linking to a thread about "Pinggy", who was also using a .online. The fact that Namecheap is giving them out for free means they probably are more scammy on average.
I've also never added domains to Google Search Console and haven't had blacklisting issue other than with a free .ml (another "cursed" TLD) site that was by default assumed to be spam by Facebook Messenger.
It's unfortunate that this category exists, but I don't share the OP's .com purism; I've used a mix of TLDs and even the cheap ones like .fyi and .cc haven't come under extra scrutiny as far as I can tell.
> is this really as critical as the author makes it seem?
It is critical in the sense that if you want to appeal the decision in a case like this, it will go much better if you pre-verified that you own the domain.
(I don't think it has much effect on google search placement at all)