Etihad seems to be running these multiple offers throughout the year on its own and its partner network loyalty programs whereby it offers double/triple/quadruple miles across various classes on its network.
Etihad and its partners are now running an offer under which if you book your tickets on Etihad or one of its Etihad Airways Partners between September 14th and September 28th, 2015 to fly anytime from September 25th to December 15th, 2015, you will receive triple the miles normally earned in Business class and quadruple in First class. You can find more details about the offer here
There is a similar offer doing rounds offering double miles on economy also but the reports that I have been getting is that offer may not be valid on all partners. You can access that offer here
Do remember that registration is mandatory for both these offer, so don’t forget to register yourself before booking these tickets on the links provided for each offer. Are you going to avail these offers? Let me know in the comments below.