I just happened to look at my swagups and noticed it now says pending. I did BB on Wednesday (I think that's when they launched?) and Friday, so I'm not sure which one actually triggered it, but I'm thinking it was the Friday one because I think my swagup was not pending on Friday but today it was and I also got my shop email for Friday.
ETA: Ooops, I didn't answer everything
I assumed the 300sb would show up when the normal shop sb show up - it was 3% Friday so 300sb for normal shop + 300sb from the swagup in 30ish days. My 750sb should post tomorrow, I'll update if the swagup posts early.
ETA 2: I'm now sure it was Fri bc on Wed only I stopped but Fri DH and I were together and each did a gc and the shop swagup is pending on both accounts