Maybe to ensure quality, only let participants who have a track record of decent photos on IFC? I guess it is a bit exclusive but many topics have been closed to to poor quality, not just in spotting.
We’ve had plane spotting competitions before. I didn’t know that they were currently banned, but if they are, that would probably be because a lot of young new users decided to hold their own and they were often full of crappy photos, terrible quality, and general disorder and chaos. But some successful ones every year are put on by @AndrewWu and some other high quality spotters.
Yes they are officially banned since I think mid December of last year. Last I heard they would “consider having staff-led ones” but that’s probably PR speak.