As per recent deal, I have tried and tested this myself, have gotten few thousands worth of SocialGood coins and cashed out to USDT.
It was $100 referral, now $200, not sure what to make of it, but my guess is they are not reaching their new sign up targets quick enough. Though, there's not much really to lose by trying out the App.
IMO eBay AU works best with tracking(12-24 hours) and approvals always happen at the end of the following month, so it takes 31-60 days for eBay AU.
Aliexpress have also worked for me. Haven't really tried other stores.
New users need to spend US$30 or more within 30 days of signing up.
For those who have more questions about the SG/App, withdrawals, feel free to DM me, happy to help answer any questions. I've been using the SG app since May 2021.