Why?

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I have try make some extra money with PTC/PTR/PPC or emails. I have a good balance from all site i follow. Total is up 30k$, but i'm not sure that can i take. Cause some site need upgrade for my acc, & i don't want spend my own money. I'm wait until i got money from other site for pay my upgrade. I don't understand, why we can't upgrade from our balance?