They can guess but it's not possible for these private institutions to "know" what policy changes the Fed will make because even the Fed doesn't know until they meet and vote. It's not practical for one of these institutions to individually request or receive special treatment or favors from the Fed. There is no one individual at the Fed capable of granting any such request. Making any such attempt would subject the institution to having it's banking charter revoked.
Compare this to crypto were exchanges can and do grant themselves special treatment and monetary favors without any permission or oversight whatsoever.
That's not a defense of crypto, it's an acknowledgement our banking system is corrupt. It's nice that it magically always works out for those in the know though.
Crypto has plenty of issues, but these defenses of the corrupt use of the Federal Reserve is pretty silly.