First of all, nope this isn't a dupe.
Second of all, here is why it's a good deal compare to s7 edge only deal:
The difference of $5*24 is only $120, while Gear Fit 2 itself is $250.
While this deal may not be better than the recent Woolies. I'm not 100% sure if "part of Telstra" is better than "100% Optus".
Also this comes with 7GB data and EPL and the data is shareable, and the EPL is unmetered.
This is an optional extra they have been offering in store when signing up for the S7 Edge with $20 off.
Might be new deal for website.