I'll concur with what others said. Most recently, in January 2023 shortly after after the stadium announcement they had the "Get Back In Line" offer for lapsed STHs. They specified that priority will be based on
cumulative years of membership, not the most recent consecutive. And cost of tickets or amount spent is not mentioned. Here is the full text of the relevant section of the email:
While we still need to go through the approval process, everyone is asking how to secure seats in the new building! When we launched the Club, we made it clear to fans that the seat selection process will go in order of cumulative membership tenure. What does that mean for you? Come back for the 2023 season & beyond to add to your previous tenure of 5 years. The more years you have been a member, the higher priority you have when it is time to select your seats. As always, our Founding Members, who have not lapsed in their membership from year one will have first priority. Next, will be all current members in descending order by total tenure.
I'm not sure thet they always specified cumulative not consecutive from the beginning (or maybe they did) but clearly the price of seats is not mentioned at all. If 2027 comes and there are 2013 Founding Members with supporter section seats, they should get the earliest access to whatever they want.