Is no one concerned about the potential drawbacks of the raid being "exclusive"?
For arguments sake lets say 100 invites go out from a popular raiding spot. So you post to your facebook group, discord, whatever you're using to coordinate and post for the given raid. Lets say of that 100 only 8 can show up. But you've posted and people who are interested and willing can't come and participate/contribute because they didn't get the invite?
My raid participation prior to the legendaries was 1 a day as to not waste my free pass.
First problem that I have seen is over the last 4 weeks now, is that some gyms don't actually spawn "legendaries" they nearly all spawn raids, the problem I ran into is that I had no gym bonus for those as they aren't convenient for me to get to.
Fast forward, if legendaries go away, I will be less likely to go to these "legendary" gyms and stick to the gyms that have raids closest to me, most convenient.
Me, me, me, me.... not necessarily. Stay with me.
There are 9 gyms within walking distance from where I work (and where I have done the bulk of my raiding). It is unrealistic to assume or expect players to "leave their mark" on a gym, by defeating it in a given week, for the simple purpose of increasing invite chances. Particularly when only 4-5 of those gyms ever spawned a legendary.
Lets say player (A) + player (B) frequent gyms 1, 2, and 3.
Player (C) + Player (D) frequent gyms 4, 5, and 6.
With legendaries these players have increased their territory and all play in gyms 7, 8, and 9.
Assuming increased raid participation (due to rewards legendaries) if Mewtwo and subsequent invites spawn in 7, 8, or 9. Everyone plays, everyone defeats, everyone has a chance to catch.
But if he spawns at 1-6 only half the players will receive invites, and there won't even be enough to participate.
Additionally, assuming a player/trainer is actively "leaving their mark" to increase chances of an invite, there isn't a guarantee a raid will be where he needs it to be at the time he is there to leave said mark.