Coupons.com has grown from processing 1% of the total coupon redemptions in the U.S. three years ago to 10% of all all U.S. coupons now, says Steven Boal, CEO of Coupons.com.
Free newcomers are starting to make a charge, however, including Google (docs.google.com), which offers collaborative word processing and spreadsheets.
For example, your casual email conversation about a Homeaway.com rental will probably confuse Worldmate's processing engine, again forcing a manual entry.