What do you think of the many sites infinitybux administration has?

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I don´t know what to make of it. I was paid some time ago by infinitybux so I have been registering in almost all the other sites. But I wonder whether they will also pay. For one thing, they don´t pay through paypal. I always worry when that happens as it seems that paypal checks more the sites before accepting them. Now they have yet another site. I wonder: should I join and click there? Will it be a loss of time and effort? What are your experiences with this administration? Share!