added 'span' into total_backers
added 'span' into total_backers

engageis/nos.vc,leonardoc2o/nos.vc,matehackers/nos.vc,matehackers/nos.vc,engageis/nos.vc,matehackers/nos.vc,leonardoc2o/nos.vc,engageis/nos.vc,leonardoc2o/nos.vc