The upfront market for broadcast and cable networks has taken an unexpected U-turn from last year’s dip, seeing an increase in advertising sales of $800 million to $18.6 billion in the most recent completion. According to research firm Media Dynamics, this 4.5% increase in TV ad revenue is a blow to OTT video platforms on PCs and mobile devices, as advertisers grow increasingly wary of the rise of ad blockers and choose to spend their precious ad dollars elsewhere. Faultline has pointed out on several occasions how companies with vested interests produce reports with wild figures on how much money ad blockers will apparently drain from the industry. While it’s true that ad blocking software has become increasingly prevalent, this…