BlackBerry 10 web usage in the U.S. and Canada saw a noticeable increase last month following the release of the Q10 on T-Mobile and Verizon, according to a report from online ad network Chitika. The results are good news for the company and its new BB10 OS, but may not be enough to make up for the larger trend of decreasing BlackBerry use.

The study was conducted over a period of ten weeks, and shows a drop in usage starting in early May followed by a steady increase by mid-May than accelerated with the arrival of the Q10 on Verizon's network. However, it's worth noting that the results are based exclusively on Chitika's own ad network, and therefore don't offer a complete image of web traffic on BB10 OS.

Despite this bit of good news, BlackBerry is still struggling to find success with BB10 and its new line of smartphones. Just 40 percent of handsets shipped in its last quarter had the new software installed on them, and total mobile traffic actually dropped over the past six months overall. The company's last earnings report was particularly gloomy, and the CEO recently announced BlackBerry may discontinue its PlayBook tablet to focus entirely on its smartphone business.