No observed cheques in the sources we track. That is a limit of our coverage, not a finding about this organisation.
From their own site: “We're a loosely connected network of behind-the-scenes investors, seasoned operators, and people who’ve earned their scars in public.”
An announcement gives the size of the round, not the size of this investor's cheque. The only rounds that imply a cheque are those where they were the sole named investor.
Something wrong here? Tell us — corrections are free and need no account.