From 2014- late 2019 I used to average what you did and never got anything from SB either.
When they nerfed nCraves I pretty much gave up on SB. I keep checking things to see what's different and don't see much changing. I use their shopping portal for things I'd order online anyway. I do a few of the in-store offers and submit a few random receipts under Magic Receipts "submit any receipt", I print coupons a few times a week and play the free games for the 10sb limit. So now I earn about $25 EVERY OTHER month!
A far cry from what it used to be when I had *something* (a device or three) earning SB all day, every day!
I can't be bothered with doing the big money trial offers and then having to fight with SB customer service (devote too much time) to get the pay-out that they said they'd give me. Been there, done that... too many times.
Is there anything else that's easy (and actually credits) that you all do regularly? I may be missing something that's new and I haven't found it yet.