ADSB Exchange has been sold by its owner to Jetnet for a reported $20M US. I think it's fair to say that a lot of people are unhappy. Between those who perhaps justifiably want it to remain open source, those who want payment for their feeds now it's 'going corporate' and those who think it's being taken over by the US/Russians/NWO/Chemtrailers all stating they'll remove their feeds, the new owners might find it tricky to keep the service running in the manner we're accustomed to. There are some reports of DDOS attacks and the map page has been unavailable at various points today, although this could be down to server changes. It'll be unfortunate if its lost as an enthusiast resource.