They sent me an email today:

Apologies for the slowness of our payment processing. We have been blown away
by the popularity of our service! Your reward of $11.00 should arrive by the
end of next week. This was for the redemption request you made on January
11th.
Thank you very much for using Brring!

I wanted to see if they would pay up before devoting any time to this. When a company takes nearly 6 months to pay out, I don't have much trust in them.