Meh, I don't feel like participating because I've done similar offers like these, and I have:
1. Frequent spams in emails
2. Spam text messages. Text message for my t-mobile service is like 10 cents per msg -.-;;
3. Random phone calls from survey companies.
4. Auto-subscribed to their service, which later on, I had to call them to terminate the auto-subscriptions.
I had to change my phone number to completely stop the random spam text messages and the random phone calls ._.;;;
I also heard that some of them are infested with keyloggers or trojans, especially the one with the blinking ads.