Hey, apologies for a late reply, but here's the honest truth from my perspective.
Back when we were planning to move away from Wikia (now Fandom), we renamed the site to "Kaijupedia" and deleted any pages related to non-kaiju media in what was less than elegantly called a "firebombing." The purpose was to prevent the old site from being mistaken for the new one, and to allow the new site to have exclusive content. That was over six years ago now, and none of us stand by that decision anymore. However, I can tell you it had absolutely no impact on Gojipedia. Any "damage" we did was immediately reverted by Wikia itself, and a new staff team were allowed to take over. All of the pages from Godzilla.wikia.com that were ported to Wikizilla.org were done so while the site was still under our jurisdiction, and many of them had been written by us to begin with. Not to mention, almost any page you look at on the site today will not be the same as it was six years ago.
As far as I'm concerned, it's not plagiarism to move our own work to a new location, as has been done by numerous wikis who've split off from corporate hosting services. There is a long line of precedent for this, perhaps most famously TFWiki who cut ties with Wikia all the way back in 2008 and received mainstream media attention in doing so. As Fandom's empire has expanded, including the acquisition of Gamepedia, it's becoming more and more common (see: Terraria.wiki.gg forking from Terraria.fandom.com, Zeldapedia.wiki forking from Zelda.fandom.com, so on and so forth). Wikia's increasingly invasive ads and user-unfriendly practices are what forced our hand at a split.
I ultimately don't really care what Gojipedia does, but there is very real plagiarism from our site that gets added there occasionally and isn't reverted until one of our own staff members complains about it. And even then it seems like their staff think we shouldn't be allowed to complain at all because we "stole" pages from a website they didn't own and that the majority of them did not join until years later. All in all, we're really proud of the progress we've made, and what happened in 2016 is not representative of how we feel or operate now. Whatever path Gojipedia takes is up to them, but any notion that we've ever tried to sabotage them is a bold-faced lie.