How often do three players stay away from the game for the same length of time - in this case, all are away for 15 hours.

And they all ticked to 15 hours at the same time.

Is this common?

Sounds like it's a case of multi-boxing. I'd watch those three players make sure nothing suspicious is going on.

I had this in my game and they were indeed multiboxing (they admitted it) sounds suspicious. Be careful and if they seem to have an alliance thats another hint. But for me it actually was good for me since i killed his alt account with a pirate navigator combo. The second Account was only there to back him up so he didnt see this coming cause he was away for like 15 hours everyday.
Btw the two players were 'popblox' and 'koolnana'. Game name:everbodys allowed. Its the sams person and he even uses the samw game name all of the time. Chanc that this is your game is pretty low vut i feel like telling it.
Edit Sorry about all the typos im on my phone and my autocerrwvt doesnt work when i write in english

I saw your post iybdi, saw their names and the game name, and remembered that game. Looked into it, and you weren't there. So, Popbblox and Koolnana have done that more than once I guess with the same game name.

Thanks guys
I'm at a much lower level than you, so the names are different - but that would fit other aspects of their behaviour

Out to 24 hours now, and all three are still dormant.

Thanks again guys, he just auto resigned
FWIW all of his characters have similar levels of experience (similar level, same no of games) - and all in the 1300 range, while the rest of us are below 1300.

This guy is active in other matches- at least one of his Alts increased his rating.
It's dropped back a bit now, due to poor showing in this match - the match finished in the last hour or so.

P.s. Everybody who stayed with the game, everybody who wasn't MBing, improved their rating