Its a funny old do...
When one considers the number of Flight Sim users there are, both here and on other sites, its surprising how few of them actually join in in Multiplayer flights each day!
I can only assume that they rarely use the Sim for actual "flying", instead they spend the time designing, modifying, taking screen shots, photographing, building hi-tech computers, Sim pits....
....Cooking?...

...

...

... etc, etc...

...!
..or else they just fly off-line, Solo each time....

...!
I browse around a number of my usual FS Sites each day, and find there are very few, if any, flight simmers involved in Multiplayer activity....
..and certainly NO FSX Flyers!
I think it has always been the same. I have been using Multiplayer for up to 10 years now, and not much has changed, apart from it being much simpler to connect to Multiplayer now...

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The same thing probably applies to "Fighting/Racing, etc, Games", few of them actually play "On Line"...

...?
How many Folks regularly use the various "Virtual Airlines" Sites for Multiplayer activities, I don't know?
The regular Week-end Tours on the Sim V Server are well supported by the Members, but the same sort of enthusiastic activity rarely appears on other FS Sites, I notice...

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I always enjoy someone joining me for a General Aviation Multiplayer tour/flying practice/navigation practice, etc, during the day, when I am on line...

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Its a lot of fun, well worth trying out, and an excellent place to find a "Flight School" for a bit of overall assistance!..

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Paul....G-BPLF....FS 2004, FS Nav..and a big bag of Sweets... 8-)...!
P.S. Its still surprising that very few of the Multiplayer Chums I join with on-line, here and on other Sites, actually use J.B's preferred "Teamspeak" method of communication...

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..the majority of them still seem happy to pop in, and use the old "Chat Window" method...(with all its faults!)...

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I've got all the necessary equipment (headset, sound card, etc) to use Teamspeak, but I just cant be bothered to set it all up at a moments notice, when I wish to connect/join instantly, and get going!... 8-)...!