I just tried the site in three separate browsers (Chrome, Edge, and Firefox) and none of them had issues with the site. I’m not sure why Norton would flag it as unsafe.
There’s a thread dedicated to WootPlus, which is run by @anakmetal, if you have any questions. It would probably be useful to him to know the specifics as to why Norton would flag it if you could provide that info to him.
(Please note: I don’t work for Woot, I just volunteer to help out here on the forums.)