Another workaround - no cost, and no Web service involved: Use convert (from ImageMagick). With homebrew it’s a snap to install:
$ brew install imagemagick
then export your Hype doc to a PNG sequence and run convert as follows:
$ cd <dir where you saved the PNG's> $ convert -delay <n> -loop 0 *.png animated.gif
Where is the delay in 1/100 of a second. (E.g., for getting about 30fps set this to 3; for 20fps set it to 5.)
You can wrap it into an OSX service as explained here:
(Actually this is where I got the convert solution from.)
BTW, yes, this thread is old but the issue still exists in 3.5.