Hi refri,
The 100 validator limit will remain in place for free users. This is necessary because our backend will not function properly without it. We are currently redesigning the beaconcha.in dashboard (frontend and backend) to provide users with more information about their validators. These changes will also be available on gnosischa.in. Additionally, paid users will have access to support for more than 1,000 validators on both explorers. You can think of it as a first party integration into the existing beaconcha.in ecosystem.