Basic prompts get 500 words written, which can be extended with donations and/or credits. Posting a link earns you an extra 500 words on any prompt you select. For every 5 people who post links, there will be an extra story of at least 1000 words. There are other perks for donation thresholds, and participating gets your name entered in various draws to create characters or locations in the settings.
Drop by and join the fun!