Pokémon Go has a word of warning for those players using third-party map applications: Stop or you could be banned. Niantic said that even if players didn’t realize what they were doing was against the terms of service, these apps “can have an effect similar to DDoS attacks” on the game’s servers.
The good news is that for banned players who used these apps without realizing their impact, Niantic is lifting the punishment… for now. However, the studio said that it will continue to be vigilant in putting an end to the use of these add-on maps: “Our main priority is to provide a fair, fun, and legitimate experience for all players, so aggressive banning will continue to occur for players who engage in these kinds of activities.”
Source: Pokemon Go. Thanks Nordavind!