I don’t know how long you have been around Ingress (I’m assuming Ingress is the game you okay as you are referring to PoI as Portals) so I don’t know how far back you have kept with the criteria for new portals to be added.
Not to sound like an old curmudgeon
When Niantic asked for new portal nominations in the days of Old they mainly wanted
public art (Statues, Murals, etc)
Places of history (information boards on history, other educational plaulques)
Places that connected people (post offices, libraries etc)
And places of worship (nods to the otherworldly)
That was really about it.
They have slowly expanded what they want as a PoI as they came upon the need for more places to interact with their games because of the enormous popularity of Pokémon Go.
Because of that game it inspired other like games to come along and they would take Niantics idea for PoGo and solve some of the issues by just auto generating places in the virtual area randomly all over. Or take data from Google maps or other sources to populate the games. At least with Niantic they have tried to keep to their original mission that what you interact with is an actual place on the map. Get you up and moving.
I have submitted hundreds of playgrounds, sports courts, picnic shelters in neighborhood parks most of which I probably will never regularly interact with all because I want to see the playfields grow. It’s exciting when you see something that you have created in one of these games be used. For many it’s just a place to gather supplies for what ever game they play but there are those out there who actually take the time to look at the pictures and read the descriptions (if there is one) and understand a bit more about their local community. Even if it’s just a “Playground for the residents and guests of the apartment complex”