Sight Unseen and Reckless were produced by the non-profit Manhattan Theatre Club (with Off-Broadway's Second Stage co-producing Reckless). Both Reckless and Sight Unseen extended as long as they possibly could, based on their LORT contracts and the artists' availability, and the schedule at the Biltmore itself, where MTC is staging three shows a year. Both Reckless and Sight Unseen were profitable for MTC, though the question of profit and loss is not as important to a non-profit theatre company.
As far as August Wilson, of his entire output, sadly, only Fences was a commercial success. (And Fences, while a very good play, is probably the least ambitious of Wilson's play cycle).
"Gif me the cobra jool!"