Wineig returns about 856 results in Google and is associated to a surname. If it's yours and you have a great idea to develop a forum, redirecting the plural form to singular or vice versa, then keep them is worth. If you expect to profit in any other way, get rid of them otherwise.
Dude it is WinEightForums which is about Windows 8 rumors etc. I wouldn't keep them as a possible lawsuit in the future and plus it doesn't contain a valuable keyword in it. I don't know how many person searches Windows 8 as "wineight". It may bring some revenue if developed but I think they are reg-fee right now.