here. Short of winning the jackpot, an Ancestry subscription is a frequent door prize at family history society conferences, 50% is the best discount I've seen.
The small print in the ad says you call the phone number given to make full payment for a one year subscription by credit card and will be automatically enrolled for renewal unless you call to cancel.
Would Ancestry management consider a similar offer to family history society members? It would be widely appreciated, a great incentive for societies to offer to new members. Is this something on which the (US) Federation of Genealogical Societies, whose member societies would benefit, would take the initiative? Maybe the genealogical community, especially the bloggers who judging by recent experience collectively have a voice that carries some weight, could help this happen.