The ransom note cover was constructed with hand cut letters that were glued out of magazines (including 2600), a tax form, and an old $2 bill.

The note is to 2600 telling us that we are the victims of a ransomware attack that substituted the note for an actual cover.

The note is on Texas stationery which was a reference to the radical abortion law that was going into effect there at the time.

The note reads:

Dear Publishers, You have been "randomly" selected for extortion.  All your files are belong to us & are encrypted very bad! You are Beyond HOPE, unless you send 25% of total income [Line 22 of your latest Form 1040] to: BTC: bc1qp64s77fke2e7ca6tadjdl9r384ymvw2gxqfc67 - Puck (he/him)

There are a bunch of Easter egg references in this:

"All your files are belong to us" is a reference to the famous "All your base are belong to us," a badly translated phrase from the opening event scene of the video game Zero Wing from back in 1991.

"Beyond HOPE" is referring to the conference of the same name from 1997 which was held at the Puck Building in New York City, hence the signature of Puck along with his preferred pronouns.

The image of Puck is from the 2600 cover from Spring 1997, including the PCS banner as Personal Communications Service was a fairly new type of cellular phone back then, made familiar by the launch of Sprint PCS.