To find the plan (free or paid) you are concerned with, Slaask simply counts the number of conversations you had in the last 30 days. This number is what comprises the “conversation” milestone as defined in the plans on our pricing page (i.e., 50 conversations per month, 150 conversations per month, etc.).
In other words, according to Slaask, “per month” means “on a rolling 30-day period.”
As an example, in our first plan, “Up to 30 live conversations per month” actually means you can have up to 30 live conversations on a 30-day rolling period.