FightRadar24 now offers space-based ADS-B from Spire to all users. This introduces detection in oceanic area but it also improves coverage in places where the ground network is less dense.
The space-based ADS-B traffic is shown in blue on the website. Traffic is clearly visible on the North Atlantic, in the Pacific area and in the Indian Ocean
Full story: https://www.flightradar24.com/blog/satellite-based-ads-b-data-now-available-to-all-flightradar24-users/