Ex Riad Pass Question

I’m pretty sure mine was for a level 4. But I’m also pretty sure that folks around here who got invites for this week’s (that I was not invited to) received it for Entei raids.

The place I just did one on at Friday, I have done nothing but Legendary Raids at.

I've only done 50ish normal, 300ish legendary, and most places I did normals are close to my house rather than the GY 15 minutes away that I did Mew2 at

I think I've only done lvl 5 raids where I got an EX raid pass.
It was at a gym where I've done quite a few raids, so it's not entirely impossible that I've never done a lvl 4 raid there, but I've done very few such raids lately and I can't remember any of them being done there.

I myself have only gotten one from doing level 5 raids but I don’t do too many other lower level raids atm. I have heard and can confirm though that people I talk to in my area have gotten ex raid passes from doing tier 1 and tier 3 raids. One guy I’m friends with got one of the first invites from doing a bayleef raid and this ex raid coming up he did a flareon raid and got invited.

Edit: He also did a magmar raid at the same location as well before he got the first invite.

My first ex-raid pass was at a gym I had only done 1 articuno raid. Then I got a second invite because I participated in the first Ex-raid. Including the second ex-raid those are the only 3 raids I've done at that gym.

I got an ex raid pass at a gym I had only raided once and that was a Lugia (Lvl 5).