If they have one account, assume they have all of them.
Edit to be less vague:
WTF is a canary? https://canarywatch.org/faq.html
ELI5: Reddit was served with one of those crazy FISA court subpoenas that they can't talk about. For national security they had to do something shady for the US Government.
But Reddit are some sneaky fuckers. They didn't violate the gag order. They just removed the "Hey, we never got one of those super secret subpeonas" statement from the transparency report they released today.
Like in the coal mines. Can't hear the canary singing down here? GTFO, we're all going to die.
Wait a minute...do these markets actually exist? I thought this sub was pure satire.