Based on the stats shown in Rimu's post, the monthly average vote count of the top 5000 of prolific voters was 1142, and among the top 147 prolific voters, their average monthly was 6868.
With a 240 daily limit, that comes out to 7200 votes per month, which is already above the average of the most prolific voters.
Those 147 top voters may be effected if they only voted sporadically throughout the month (so they vote like, 500 one day and 700 another, but with some rest days of no voting in-between), and those posting above that average who definitely would be effected appear to only total about 60 people.
So for 99% of the userbase, they would not need to consider rationing votes at all.