You have followed yourself by thinking about something that is not worthy of attention, for example, not all campaigns ask you to participate in the number of Merits you have earned in 120 days, and who did this with the main purpose of that is making sure of your activity during the recent period and making sure that the style of writing has not changed with the acquisition of those Merits.

As for why the number 120 represents a quarter of a year, which is usually a measure of activity by divide year into 4.