Facebook isn’t often thought of in terms of “commerce,” a la retailers such as Amazon or financial institutions such as American Express, but it makes a strong case for itself as a company that “unlocks” commerce. Speaking at The CardLinx Association’s Mobile conference in San Mateo on Feb. 24, Facebook Head of Payments and Commerce PJ Linarducci joked that his “day job” is “collecting (payments) from two million advertisers a month to help them connect with their audience.” These involve payments in 55 currencies, with 800+ payment methods. One million transactions take place daily.

Is there is a clear link to commerce from Facebook’s base in advertising? Linarducci thinks it is fairly obvious. “Commerce is about information,” he said.

With placement on 95 of the world’s cellphones, and detailed profile and usage information on its users, commerce also extends the company’s broader social mission. “Payments are just a point in social; helping people get what they want,” Linarducci said. He suggested that many marketers might post offers instead of ads, if given the opportunity.

While Facebook does not appear to have moved forward with several tests involving virtual gift cards, prepaid deals and virtual credits, the company is actively exploring all its commerce options. For instance, it is currently highlighting buy buttons attached to ads, and classifieds for groups.

“The big picture is to look at Facebook in terms of its access to audiences, its payments infrastructure and as providing world class tools,” said Linarducci. And commerce is happening on the site whether Facebook is directly involved or not. “People hack around the system to make commerce on Facebook — despite us not doing anything to help them,” he said.