I play the Daily Freebies almost everyday, Battle Royale and Spin n Gold but have noticed that some GG members (CC members) can't be bothered.
No idea why as they are a real earner. For me the Spin n Golds earn me twice as much as Battle Royale (which I have won several times) but it's hard to put things down to weak fields or just run good. In most cases a couple of strong cards high in your range are going to result in all ins- that's pretty much the strategy summed up. Yeah, often, newbies especially will play any two cards but others are more measured.
But, I really appreciate the opportunity and the gains made- definitely given me a favorable view of GG.
That said, I personally prefer the Spin n Gold 6 max where you actually stand some chance of getting a feel (no matter how little) of your opponents!.