Grandparents.com has a 30% conversion rate on their newsletter signup: http://www.theboomerblog.com/2009/02/how_to_market_to_grandparents.html http://www.thebo

Grandparents.com has a 30% conversion rate on their newsletter signup: http://www.theboomerblog.com/2009/02/how_to_market_to_grandparents.html http://www.theboomerblog.com/2009/02/how_to_market_to_grandp... So this sounds believable actually.