Since Mighty 9 kickstarter has finished recently, it seems there's a lot more people that now notice Shantae's game. They have 10 hours to go though, which means they will have to rely on Paypal for payment only. Unless there's a way to extend the time left to donate.
And it has reached the $800K surprisingly. The funding has ended, though. So unless the Paypal donations amount to a lot, this is probably the end of it.
WayForward has updated their page shantae donate page with a Paypal counter that will update every 15 minutes.