It is good to see that Devs are active once again and will keep us uptodate with current development and features.
They havnt ever NOT been active.. Sometimes though, when someone is so active they have no time to stop and tweet "we just wrote 100 more lines of code!!".
RBR is awesome project and will change the crypto scenario marketplace looking promising,
testing will be start soon and many merchants are interested to test marketplace.
I doubt there are a lot of merchants. There's other ways to determine with reasonable probability what they're up to.