FYI for those considering the Oklahoma! lottery these days: The lottery loser emails still come with an option to buy $59.50 tickets but sans a lottery loser code. In other words, there's no way to avoid the Telecharge fees by buying lottery loser seats at the box office.
That being said, the box office agents at Circle in the Square are some of the nicest agents I've interacted with at any Broadway theater. They should be able to match the $59.50 price at the box office for partial view seats (if available). They were also helpful in giving me an idea of whether SRO tickets would be offered for a specific performance (and, according to them, SRO tickets, when offered, have never been completely sold out at any performance). I was lucky to have snagged a SRO ticket for today's matinee.