Many online retailers spent more heavily on paid search ads around Thanksgiving this year, and generated additional sales as a result, search marketing firms report.

Here are key data points from several search marketing firms, based on their clients’ spend and sales from paid search:

Skai Inc. says its U.S. retailer clients spent 31% more during the 26-day period ending Monday than during the comparable period last year, resulting in 83% more purchases and 60% more in online revenue.