I have seen more and more people sharing the Thanks Tesco I've just claimed my free £200 gift card post on facebook lately and now the horrible scammers are adding Sainsburys and M&S to the list too. It is all a big scam to get you all to share your personal information in the hope of a voucher but in reality they are taking and using your information to try their hardest to commit ID fraud on you.
Genuine competitions will NEVER ask for personal or sensative information off you. The site you are redirected to will look genuine with official logos and slogans and the same text fonts etc but who can't lift an image off google and make it look real? Never give your home address or mobile number out for a voucher comp because real competitions would just ask for your email address and the worse you will get is spam emails but if you give your mobile number out, the reality is you will get hit by ££ premium number texts.
I expect we will see more and more of these as we get nearer to Christmas and budgets get stretched and people look for ways to get extra cash.As the old saying goes - if it looks to good it usually is - just a heads up to be aware and share this rather than the voucher site with your friends and family.