You and I might call it spam, but small businesses who promote their products on social networking sites like Facebook and Twitter call it smart advertising. No matter what you call it, don't expect those product plugs to go away any time soon. In an online survey, Internet2Go found that 45 percent of some 2,400 small business respondents with fewer than 100 employees said they use social networking tools to push their services or wares.

"For these guys, costs was a big factor," said Greg Sterling, an analyst for Internet2Go. "They either need to hire a dedicated person or need more resources and don't have it.

We're talking really small businesses here, as most of the respondents -- 8 out of 10 -- had four or fewer employees and annual marketing budgets less than $5,000. Nearly half of all respondents said they spend less than $1,000 on advertising and marketing, so it makes sense they would flock to Facebook and other essentially free venues.

"We are going to see more and more of this behavior from other small businesses because it's free and you don't have to have expertise to set up these pages," Sterling said.