Ask any e-mail marketer what their biggest challenge is and list-growth will surely be somewhere near the top.
Enter Pontiflex, a Brooklyn-based startup whose name takes the word pont, which is Latin for bridge, and merges it with flex to mean flexible bridge.
The company has developed a cost-per-lead, do-it-yourself e-mail-address-acquisition marketplace where advertisers can search for publications that meet their criteria, build their own creative using multiple templates, and send the campaign to the outlets they
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