Perhaps it's because if one navigates to megado(dot)com it is all about the star mega do.
Then there is this pesky little sucker at the bottom of that page:
© 2013 MegaDO. All rights reserved
See, MegaDO is a Delaware-based LLC owned by some familiar names.
So the use of "MegaDO", particularly its use combined with sponsorship by a sister company of MegaDO LLC, likely lead to the confusion above.
In any case, it looks like a terrific event, keeping with the original spirit of FlyerTalk DO's.