(via) Google supports unavailable_after, and also 1-visit pages (which you can visit once for free, but after that you have to pay for them). Google is really newspaper friendly actually, they go out of their way to index content behind a pay-wall.
(via) Google supports unavailable_after, and also 1-visit pages (which you can visit once for free, but after that you have to pay for them). Google is really newspaper friendly actually, they go out of their way to index content behind a pay-wall.