Facebook users are advised to be on the lookout for scam posts that claim to offer free vouchers for the clothing retailer Primark. According to Hoax Slayer, the scammers ask users to like their Primark Vouchers page and share the posts that advertise the vouchers. Then, victims are asked to complete online surveys which generate a profit for the cybercrooks. Some of these surveys also instruct Facebook members to provide personal information. Victims can end up…