I'm commenting less on Summly and more on the general case. People who bolt together existing tech into something people want are extremely valuable. They have identified demand and found a way to address it using off-the-shelf components. The risk, often, is that someone else can just as easily bolt together the same components. This risk is mitigated by locking in the demand source, e.g. through brand recognition from your first-mover position. Someone able to rapidly bolt together a product that they subsequently ensconce with piercing marketing or another form of customer lock-in is a gold mine.