$GameStop (GME.US)$
Per Section III, C. DTC’s Response Letter to Opposing Comment Letters https://www.sec.gov/rules/sro/34-47978.htm
TL;DR After GameStop issues its shares to the market, they no longer hold ownership rights to those shares, therefore GameStop can no longer make the decision to withdraw the shares from the DTC.
DTC says that GameStop would be interfering with beneficial shareholder rights by trying ...

$GameStop (GME.US)$  issues a official guidance 3 hours ago.
IBKR clarifies instruction from DTC.
GameStop Guidance for International Stockholders with Split-Related Questions   
GameStop has notified its transfer agent and the Depository Trust Company (“DTC”) that some of our valued stockholders in international geographies are still trying to determine if they have received th...

$GameStop (GME.US)$
Seems like brokers are declaring it as a form of forward split, instead of as a form of stock dividends.
DTCC processed it
Event type: ‘Stock Split’
Processed as ‘Stock split’ instead of ‘Stock dividend’?