What is the number by the fire icon below an account in the forum?
It is the number of coins that you have in the last month. You can check this in your statistics.
I think it just represents how active someone is on LingQ.
I think it's the activity score.
That's the number of total coins earned in last month.
It is not the activity score. I have here 20306 points next to the fire icon but my activity score on the app just about 1100. I'm looking for the coins over the last month but don't find it on the statistics section on the app.
It is the number of coins that you have in the last month. You can check this in your statistics. It is measure Activity Streak, not Activity Score. It's a difference between them.