Beverly Hills-based Hydra, a pay-for-performance advertising network, said yesterday that it has named Josh Eldridge as the firm's Director of Display Media. Eldridge joins the firm from LowerMyBills.com, where he was Marketing Director. Eldridge has also served at CarParts Technologies, L. Norman Howe & Associates and American Home Foods. Hydra operates an advertising network where advertisers only pay if the firm generates leads or customers.