We tried in December and learned a lot! We used surfe.com to manually scrape leads (HRs) from Linkedin. Surfe allows you to add the potential leads to pipedrive and from there we downloaded a CVS list that went to mailmeteor.com for the cold email campaigns. Results: Leads approached: 500 Open rate: 55% Click-through rate: 54% Warmed prospects (leads that opened+clicked more than 2 times): 286 My colleague @tina_sisman managed this campaign and she has lots of insights in this regard!