Read what 37Signals&#x2F;Basecamp who has spent 15 years building their (huge) audience on their own site says:<p><a href="https:&#x2F;&#x2F;m.signalvnoise.com&#x2F;signal-v-noise-moves-to-medium-c8083ce19686#.lka3ttxc8" rel="nofollow">https:&#x2F;&#x2F;m.signalvnoise.com&#x2F;signal-v-noise-moves-to-medium-c8...</a><p>I think the number 1 reason is reach.