You haven't lost the plot.
There is two words that has caused many folk to jump to misunderstanding change.
A better statement would have been something like.,.."rule limit of 2 visa exempt via land/sea per calendar year removed"
Instead they announced "unlimited border exempt entries "
All this change does it to bring visa exempt land border entries into line with entry via Air.
That reduces down to "no stated limit and up to the immigration officer discretion"