Boulder-based BlogFrog said it has launched a new program which will connect "leading" bloggers with brands looking to reach consumers, via its new BlogFrog Influencer Circle program. The firm said leading bloggers who consistently create "engaging and useful content" will be invited to join the network, which matches them with brands running influencer marketing campaigns. BlogFrog said that so far, it has 100,000 bloggers and social influencers in the program. The program invites bloggers to participate in specific campaigns from brands, based on demographics and areas of interest.