Tufa generates revenue from retailers that pay additional commissions, on top of what’s given to the Tufa Circles. It has 12,000 participating retailers at launch. Tufa co-founder Matt Hasten.

Solih Birka Tufa, a 23-year-old Portland State University student, was sentenced Wednesday to 60 days in jail for a Jan. 5 hit-and-run that injured a woman who was nearly seven months pregnant ...