Niantic has made it a point to block all third party developers from accessing their servers. The implementation of reCaptcha system only managed to slow down bots and scanners. But the continuation of these third party services are very costly as developers have to spend a lot of money to have the reCaptcha solved.
Niantic managed to take down all third party scanners with their recent security update. Bots did not escape the onslaught as well. In order to bypass the new API, reverse engineer is needed. The lack of interest from reversing community is troubling, but this is not surprising as Niantic has made it very clear that they are not happy with third party services accessing their servers.
Niantic has pushed few security updates which are aimed at third party services. Scanners, trackers, and botters faced a hurdle when the Captcha system was implemented but that does not kill them off totally. Just when these third party services are about to solve the reCaptcha problem. Niantic updated the API which disabled all access for these third party scanners and botters.
Niantic has just activated the Captcha system which crippled third party apps, botters, and scanners.
In the fight to prevent third party apps and services to access their data, Pokémon Go developer has tightened their security by enabling Captcha if any unusual behaviour is detected to verify that it is not controlled by machines. The biggest Pokémon Go map scanner, FastPokeMap is still working but only at about 40-50 percent capacity.
The most popular Pokémon Go map scanner, FastPokeMap has tightened their security and closed down third party API access to stop others from scraping their data. This means that many trackers that depend on their API will stop working.