If Haiku Deck solves a problem (how to use the creative commons) Scoop.it
are surfing an ownable trend - content curation.
When these tools launched the Google trends line for "content curation" was pointing north, but the speed and steepness of the subsequent adoption owes much to the intensity ADDED by these new tools.
Today a successful SaaS MUST create its own community even if most of its cash is B2B. B2B without community is a nonstarter because its too exposed. B2B without community is too costly to promote and can't take a direct hit.