To be fair, that post / thread doesn’t give a definite answer.
I’m in the same boat; I didn’t know about any of these changes to Plus until today (I don’t look at the community that often); I haven’t been emailed by Monzo nor heard anything from them about Plus. All I know is I’m continuing to give them £3 / month for the privilege of having a blue card (I didn’t select any options at sign up as I stupidly thought I could later; and interest doesn’t seem to exist on my account either).
Communication has been terrible here; and I can’t see what I’m paying Monzo to have…
Please. One thread.