This whole idea that Hasbro retired the Dinobots is highly dubious. It sounds like the kind of thing a third string Hasbro marketing person spouts off in a side interview at a convention one time, and then two years later when Hasbro announces the new line of Target exclusive Masterpiece Dinobots people are saying "hey, remember when they retired the Dinobots? What happened with that?"
The only consistent rule with Transformers is Hasbro is going to do whatever they feel like and view as likely to be profitable. They can say all they want about what's retired but unless it's a legally prompted decision (a la reissues not passing drop tests), anything they say about permanent decisions is meaningless.
Heck, take a look at G. I. Joe.
In 1987, they had the original Cobra Commander get shot in the back by a traitor.
In 1990, he returned, re-took control of Cobra, ordered the traitor buried alive, and for good measure ordered a number of suspected co-conspirators buried alive with him.
Ca. 1992, they had it that two of the people who were buried alive, Zartan and Billy, somehow managed to escape... just in time for Zartan to get a new figure release.
That same year, they revealed that a third guy, Firefly, faked his death and also managed to escape... thereby giving the writers a chance to show off his new figure as well.
Oh, and the next year a fourth guy, Dr. Mindbender, got cloned because CC decided that he actually did
need his resident mad scientist after all. Cue new figure.
And now I hear that Sneak-Peak, a Joe who bought it in 1991 when he got mowed down by a Cobra heavy weapons team, is now alive and well in the IDW continuation of the series.