Y Combinator alumni Referly has acquired 500 Startups’ LaunchGram, a product release reminder service. Because the acquirer allows users to curate and recommend products in exchange for affiliate revenue, the two companies have significant overlap in target customers. The size of the cash and equity deal was undisclosed, although it has the smell of an acquihire. Referly will keep the LaunchGram product alive. [Source: TechCrunch]