That's a yearly price, not monthly, so not really a high price. If a professional developer saves one hour per year with this tool it's already paid for itself.
If that developer bothers to go have their boss pay for it.
I’m not going to subscribe to something that ‘may save my ass someday’, but I would buy it for my arsenal because that someday might be a year and one day from the time of purchase
(Also: Fork has a decent interactive rebase with drag and drop and is a one time purchase. Probably not as slick as this though)