Headlines By Blockspace

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SCOOP: ICE raids bitcoin mine in Pyote, Texas

The Immigrations and Customs Enforcement (ICE) agency arrested 12-13 staff members of a Bitcoin mine repair center in Pyote, Texas, Monday September 29 - link

Core Scientific sets October 30 vote for CoreWeave deal as major investor urges “No”

Core Scientific (NASDAQ: CORZ) has set a virtual special meeting of stockholders for October 30, 2025, at 10:00 AM EST, to vote on the proposed all-stock merger with CoreWeave (CRWV). Two Seas Capital, which owns approximately 6.2% of Core Scientific’s outstanding shares, filed a definitive proxy statement and GOLD proxy card urging investors to vote against the transaction. - link

Rosenblatt reiterates Buy on Cipher Mining, lifts price target to $14 as Fluidstack deal marks HPC shift

Rosenblatt Securities raised its price target on Cipher Mining (NASDAQ: CIFR) to $14, framing the company’s first HPC hosting agreement as a transformational step beyond bitcoin mining. This price target implies 17.7% upside from the current price of $11.89 per share. - link 

Strategy’s $128 million ATM haul dwarfs bitcoin buy, now holds 640,031 BTC

According to its September 29 Form 8-K, Strategy Inc. (NASDAQ: MSTR) raised $128.1 million through its at-the-market programs between September 22–28 but deployed just $22.1 million into 196 BTC. The bulk of proceeds are likely for preferred stock dividends, which will be paid on September 30. - link

Crypto asset funds post $812 million outflows as macro data dents sentiment: CoinShares

According to asset manager CoinShares, digital asset investment products saw $812 million in net outflows last week, their first sizable withdrawal since early September, though year-to-date inflows remain robust at $39.6 billion. — link

Here’s what Bitcoin’s top devs think about filters

The Bitcoin greybeards are finally entering the filter argument, a subject that is top of mind after leaked texts from Luke Dashjr suggest that one of Bitcoin’s most prominent developers wants to up his filter game. 

While these developers are on the Bitcoin Mount Rushmore, they’re not really known as talking heads.

You won’t catch them making youtube videos or debating endlessly on Twitter spaces. They tend to prefer longer, forum-style communication such as the Bitcoin Developer Mailing List.

(Another reminder that most of the smart people aren’t on Twitter).

Blockspace trudged through the mailing list so you can get the skinny in just a few minutes. Here’s what they’re saying.

Greg Maxwell: “The purpose of the mempool is to model what will get mined”

One of the most legendary Bitcoin developers of all time, Gregory Maxwell (“Gmax”) was a co-founder Blockstream and responsible for coinjoin and confidential transactions.

Plus, he was the author of the original taproot proposal.

While Greg has not considered himself a Bitcoin Core developer for at least 8 years, he still commands significant “soft power” over developer mindshare.

Greg is decidedly against altering mempool filters, arguing that changes could be a centralizing force:

“Significant discrepancies are harmful to the system and promote centralization and fail to achieve a useful purpose in any case. What marginal benefits might be provided do not justify building and deploying the technological infrastructure for massive censorship.”

Andrew Poelstra: Filtering beyond fees is “contrary to [the] purpose of the mempoool”

Director of Research at Blockstream and influential in the development of Taproot/Schnorr and Miniscript, Andrew Poelstra is known for rigorous formal approaches to Bitcoin and privacy primitives.

Poelstra emphasizes that there’s little functional difference between relaying a transaction and relaying a block, meaning that if you want to not relay certain transactions, you also would not want to relay blocks with those transactions in them.

By Bitcoin’s nature, you can’t really pick and choose whether you like certain transactions or not:

Energy Markets for Bitcoin Miners: Colocation and Off-Grid Mining

This Hashrate Index article explores how miners turn stranded energy into a competitive edge, and why structure makes the difference.

→ Explore the full article.