I got the same email. The deadline to accept or decline UW offer is may 15 I believe? So I think for now I personally would just accept if you’re still deciding, and if you don’t end up enrolling by the 15th next month then that’s that. Either that or explain to them how you’re waiting for other schools and you’d rather wait to accept the scholarship until you’ve decided on attending, and see if they’ll grant an extension.
also for anyone that was going to appeal their aid package with other competing offers- I tried this and they could not match my scholarship. They did offer me 6k of work study which I was not offered initially.