RTL-owned ad platform SpotX has made yet another move to consolidate its reach within ad tech. The company invested in SpringServe, an ad-serving platform for OTT and connected TV. With SpotX already on the front foot, following a string of acquisitions and partnerships over the past 18 months, surely an acquisition is on the cards here, too? For now, this is being labeled a “strategic investment” to bolster SpringServe’s product, engineering, and R&D tools, but this is no nonchalant display of support. Both companies have something to gain from an acquisition – SpotX would get full autonomy of SpringServe’s ad serving tools, while SpringServe would get some much-needed clout and financial security. NY-based SpringServe offers a suite of ad serving…