I think you can only use the EGP so many times, so better to just take the full ban now than lose your EGP and get a similar ban come finals, where an EGP might have see your punishment down graded to just a fine, or less matches.
This isn't correct, there are no limitations on the use of the early guilty plea.
Previously (prior to the current system being put in place in 2022), "no contest" was used to offset points accumulation during the regular season - if it was beneficial to a player to plead no contest and sustain a suspension more immediately rather than have an accumulation of points hanging over them later, some opted to do that. This was especially useful to diminish points balances for players who were injured in the same game they were cited in.
The sole reason to use it now would be how it was used by Elliott Whitehead in Round 12. He sustained a pectoral injury that has kept him out since then (and was described by the club as indefinite at the time).
He was charged twice in that game and with his record his options were $3k or 2 matches for both charges.
Rather than be out of pocket $6k, he elected to plead no contest to one of the charges and early guilty the other, so he only had to pay a $3k fine and if his injury had healed in a fortnight he could then return.
@Apey