With online advertising expected to rise again, more start-ups may try to enter the still-crowded remnant ad network space. The latest entrant is Israeli-based ad optimizer IgnitAd. The company has received an undisclosed seed round from DFJ Tamir Fishman Ventures and JVP, through JVP Media Studio, its incubator. The company is currently still in stealth mode, so it’s impossible to say what differentiates it from the legion of established ad nets. The companies executives, led by Assaf Roth as CEO, have previously worked for a number of other small start-ups, including FixYa, 888.com, and Certagon. Release