Twitter is a popular micro-blogging service that allows you to send updates (up to 140 characters in length) via SMS, IM, the website, and third-party applications.
It also has a handy feature which allows you to send direct (private) messages ("DM") to your friends on Twitter.
flok.li service builds upon that feature extending it to allow sending single message to many recipients (followers).
User who wants to use flok.li simply follows @2flk user and sends commands and messages to it. User can manage groups of followers ("flocks") and send messages to @2flk user which in turn distribute the message to each member of flock(s).
To find out how to manage your flocks and send messages, follow this link: Learn more.
Messages can only be sent to user's followers. Each user is allowed to send a total of 250 messages/day. Those are the limits by Twitter's design, not this service. Learn more.
Therefore, we allow each user to create up to 5 flocks with up to 10 members each. If user sends 1 DM to a flock, we will send 10 messages from user's account to flock members which totals to 25 messages a day.
Of course, it depends on real number of flocks and flock members and one can send as many DMs per flock until the total number of DMs reaches 250.