Update 21 September 2018 @ 1725z:
Another developer, Indiafoxtecho, has come forward with a similar story of not getting paid, and no contact with FSS, since May. They ask you avoid buying their products from TheFlightSimStore until further notice.
Original article:
With troubles over at TheFlightSimStore still ongoing, and with many developers not getting paid, Milviz has joined the ever-growing list of developers advising their customers to not buy their products from TheFlightSimStore.
In their statement on Facebook, Milviz elaborated that efforts to contact FSS over the past few months have gone ignored, and they haven’t been paid for their sales in the meantime. At this point, Milviz states that, “It is with regret that we have to ask you not to buy our products from The FlightSim Store until further notice.”
This is sad news indeed for the Store, but not paying developers when you still sell their products is, frankly, unacceptable and extremely shady. More as we have it.