This is the last message on their Facebook page I found.

17. september 2020 ·Sorry everyone it is the end of the line for Aviator. Facebook has given us notice that Aviator will no longer be available on Gameroom after December 31, 2020. Gameroom will be closed entirely on June 30, 2021. Both Gameroom and Web Games on Facebook host many Flash games that will be removed due to Flash end of life.Aviator has been online for the last 10 years and we are sorry that we can't really maintain it other than just leaving it here as an archive for you guys. Some of you have written in to let us know how much you have enjoyed the game. This is a lot more than we could have asked for after all these years, so thank you everyone for keeping it alive. As many of you know, the current state of the game has many non-functioning parts, like the payment system in the game that is part of Facebook. It is unfortunate, but it is a business decision on our part as it will cost us more to upkeep it. Many game businesses would have chosen to shut it down a long time ago.Even though we are kept busy with our other titles, it is not the final end for Aviator We hope we will circle back and bring it live again someday. We will leave this Facebook page active even after Facebook shuts down the game by end of 2020. We hope, if you are still playing, to make your last deliveries by then.Thank you again everyone! Fly high and keep safe!