I've been seeing these Trial Pay options for a while now, for the likes of Avira etc. I've always been skeptical of these, and always recommended people stay away from them (if you don't want to pay for a licence to use a program, don't use the program - there are almost always free alternatives). Sadly, people still believe Trial Pay are going to give you a free subscription to something - this is simply NOT TRUE.
In the vast majority of cases, you have to either PURCHASE or REGISTER for something in order to get this "free" licence. As I've said many times before, if you've got to pay or register for something - IT IS NOT FREE!.
Don't believe me? Check their terms of service, specifically;
Still don't believe me? See what my friend Donna has to say;