Yes and no. SSS is the official Hololive song but unofficially Fukkireta is the most popular video on the Hololive channel to the point of every branch doing their own version. 32million views total vs 6m on SSS.
It seems that Sakana dropped some money into promoting the video using youtube advertising once Uruka uploaded that cover. He also seems to have done the same for Michiru's song which had about 2k views total after a month (which is criminal) and its not at over 20k in just a few days. Smart move. Read the comments of Uruka's song and you can see that there are a ton of people commenting how it showed up on an ad and they did not skip it because it was too good (which I agree).
Screenshot taken from Uruka's comment section. Notice how almost all of the comments are mentioning the Ads.
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She sounds drunk.
Holy shit, the Whale just prints money. She made a disgusting amount of money on that outfit reveal and she will probably make another shitload of money on the karaoke.