This is the critical calculation where we determine how many tickets from a game printing have been sold! It stands for the "Estimated percentage of tickets sold".
We calculate this two ways:
1) we scrape game data every day, so we are always getting the newest games daily.
2) we track the detailed prizes claimed, daily! So, if on day 1 a game is 0% sold, and we track all of the detailed prizes remaining every day, we can easily calculate the % of tickets sold!
So, why do we call it "Estimated"? Because every state published different levels of detailed prizes, and all states don't update their websites daily. So, we have to be conservative and call this an Estimate, however, it is pretty darn accurate based on the way we pull and analyze game data!