This card looks very bad. However, it is actually quite good and valuable for Weyland decks using Regulatory Capture.
Taking bad publicity is generally bad. You're generally supposed to be compensated with money for taking bad publicity. This is why Hostile Takeover, Too Big to Fail, give you big money in exchange for taking it, so the corp accelerates their game to try to win before the runner get get too much leverage. This card, when you rez it, you LOSE 6 credits, and you take a bad publicity. And increasingly more bad publicity, not profiting from it at all (you profit a little if you are The Outfit: Family Owned and Operated.)
The trash cost is high, but its win con only lets you win after a ridiculously long amount of time, and the closer you get to winning, the easier it is for the runner to trash it. So as other reviewers say, it looks more like a Tik Tok challenge than a part of a legitimate strategy.
The point of this card is the following.
You play a big-money bad-pub weyland deck like The Outfit: Family Owned and Operated or Weyland Consortium: Building a Better World. You have 3x Hostile Takeover, big 3 pointers, and 3x Regulatory Capture. You probably have Punitive Counterstrike, to force the runner to play around that.
Good news, 8 turns went by. You scored 2 Hostile Takeover from hand. You scored Send a Message, simply IAA'ing it like a boss because you had 40 credits and the runner only had 15, and they had to respect the double Punitive Counterstrike. So you're now on 5 points.
That's when you install the Superdeep Borehole. You rez it at the end of the runner's turn, taking 1 more bad pub, to a total of 3. Now, the runner absolutely must trash this thing on their turn, or you will get to 4 bad pub on the start of your turn, and be able to score Regulatory Capture from hand for the win. If the runner is a Nyusha "Sable" Sintashta: Symphonic Prodigy on Tunnel Vision, odds are they won't get past your remote server ice on this short notice anyways.
Congrats! You managed to get 2 bad pub from the borehole. You can now simply Extract the borehole, you don't need any more bad pub, and its built-in win con is goofy anyways. Now you simply draw into Regulatory Capture and win the game.
What's that? The runner huffed and puffed and trashed your Superdeep Borehole before you could get a second bad pub from it? That's okay, install another. If they don't trash it (face down) before the start of your turn, you'll get your 4th bad pub and proceed as planned. If they do, they paid 6 to trash something that you didn't even rez.
Or, at this point, just draw into the third Hostile Takeover. Then you are at 4 bad pub. What's a runner to do.
So, particularly in the (Parhelion) startup meta, this card is key to any weyland decks that want to run Regulatory Capture, because this and Hostile Takeover are the only ways for you to get bad publicity in Parhelion startup. And while it may seem crazy expensive for what it does, because it gives you a path to score Regulatory Capture as a 2/2 from hand, it creates a win con that is actually very hard for the runner to disrupt. You don't need to have both a 3/2 and Trick of Light in hand, and have advancement counters on the board, to fast advance. You don't need to have Biotic Labor and a pile of money and a 3/2. You just need to have played normal weyland for a while, and at some point installed a borehole that stuck around for two turns. And you don't have to try to score a second 5/3 pointer behind ice to win anymore, which is often the achilles heal of Punitive Counterstrike decks, which gets mooted once the runner steals 4 points from R&D before you can win.
So, contrary to what other reviewers are saying, do not "install this early", and don't focus on the "when it is empty, you win the game" text on the card.
Install and rez only when you are 2 points from victory so that all you have to do is draw into Regulatory Capture to close out the game.