Not sure this was posted but didn't see it earlier.
I would suggest using individual incognito for each of these offer.
Search for FabKids, View offer, Click on Get Started, do the quiz and then sing up. You'll get 125SB.
Close the browser and open a new incog. window and repeat the process for offers "Shoedazzle", "JustFab" and "Fabletics". 125 & 200 SB respectively.
The offer may be for 2000 or 1500 SB and say you have to spend money. But not required for earning the signup SBs.
Use throw away email. I was short of 500 SB for next GC and all posted instantly and done about 15 minutes.