Josh Gordon reports that the BPA is testing new metrics for digital-only magazine audits. This has to be a good thing: I’ve been banging on about my belief that digital magazines have a great future because they offer things that simply aren’t replicated in a conventional publication website. If the BPA can find ways to quantify the level of engagement from readers of a digital publication, it’s going to help advertisers get a much better handle on whether a digital publication is the best place to allocate some of their hard-fought advertising budget.