Probably only Lego actually know how well it sold.
We all heard about it going down to half price in Walmart, for what that’s worth. Also bear in mind that if it was particularly successful, they’d probably extend its shelf life. On the other hand, I haven’t seen it get discounted in the UK, other than once from Smyths, so presumably it’s not clogging shelves up.
As such, it’s presumably sold reasonably as well, and perhaps as much as Lego expected.