Based on the previously written go hub article about triggering ex-raids: https://pokemongohub.net/gym-raid-update/comprehensive-guide-trigger-ex-raids/
I see 500-850 points being mentioned to trigger one, however, I’ve had plenty of occasions where ex-raids have been triggered with nowhere near 500 points according to the formula mentioned in the article (raid level times number of players), which also makes me wonder if the formula is wrong or the minimum number of points is wrong.
As an example, after one of the legendary bird days, an ex-raid was triggered on a gym local players usually avoid, on the day there were about 20 players raiding this gym, that’s about 100 points based on the formula published in above article.
Another example, the gym we had a deoxys spawn on yesterday was not the gym everyone was hammering, the gym being hammered was just up the road in a different cell, other than 23 players doing a level 5 raid on the gym deoxys spawned on during chikorita community day, I don’t believe there were other big raids done on it.
This makes me wonder, could the minimum points required be much lower than 500? E.g. 100, 150, 200? Or is the formula wrong and it is actually something more like number of players times level squared, e.g. 20 players times level 5 squared (25) is 500 points, which would put more emphasis on people doing higher level raids. Or is it simply that one raid during the week must itself have gotten so many points and if you raided at other times you may get an invite?
Just trying to help a person in another town with fewer players get on top of ex-raids so that they can trigger them more often.