ARLINGTON, Va.--(BUSINESS WIRE)--loop88 (www.loop88.com), the leading creative marketing platform on Pinterest, is excited to launch a new service for brands and agencies that are looking to work on Pinterest. Instant, the new offering from loop88, will help brands test Pinterest and find the right mix for their social media marketing plans. Working with brands and agencies, a consistent issue has come up: brands love Pinterest, but are unsure how to begin or how to work within the community. W