Yes, this seems similar to the Congressional practice of "paired votes," where a Senator or Representative who expects to be absent from a key vote will find some colleague who has an opposing stance and agrees not to vote, so the absence of the former will have no impact on the outcome.
Besides, this web site notes:
>Is it legal?
>
>A spokesperson at the U.S. Justice Department, which investigates
>potential
>instances of voter fraud, said it is, since the sites "serve as a clearing
>house. There is no pecuniary exchange, and it is an agreement amongst
>private parties, no legal violation there in terms of violation fraud. It
>definitely is an innovative campaign technique, to say the least."
Carl
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