Internet and the boom of PTC

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In internet, now, there are a lot of PTC, PTR. All this can be a medicine for the crisis? What do you think about that? And how you can be sure that this PTC aren't scam? How many ptc do you use? which are that? I think that the right PTC can risolve the crisis, but in a lot youearn only few cent of dollar. For you, ptc can it be possible?