User engagement "may be facing headwinds" over the next 12 months, according to a recent Raymond James poll. Their survey of 362 Facebook users indicated that 19 percent expect to decrease their usage of Facebook over the next year, the highest percentage of the 10 leading Internet sites polled, according to a note to investors on Wednesday.
Only 12 percent of users expect to increase their Facebook usage over the next 12 months, the lowest percentage of the 10 sites polled.
Last month, Facebook announced a new service called Facebook Exchange that allows advertisers to obtain information about users' browsing history and bid in real-time for relevant ads.
Rick Summer, analyst for investment and fund rating company Morningstar, said the service "signals the most consistent trend that we expect for Facebook's future."
"The company will need to continue investing in deep technology solutions to maximize the value of its user base to advertisers," Summer wrote in a note to investors last month.