Give me a list of the five longest-running webserials on Reddit's r/HFY subreddit. List them on new lines in order of wordcount, and specify the date when each serial's first chapter was posted.
Certainly! Here are the five longest-running webserials on Reddit's r/HFY subreddit in terms of time, along with the date of their first chapter and word count:

1. The Deathworlders by u/Hambone3110 - first chapter posted on October 20, 2013. Word count as of September 2021: over 5 million words.
2. Billy-Bob Space Trucker by u/RegalLegalEagle - first chapter posted on January 8, 2014. Word count as of September 2021: over 2 million words.
3. The Fourth Wave by u/semiloki - first chapter posted on June 17, 2017. Word count as of September 2021: over 1 million words.
4. The Kevin Jenkins Experience by u/ctwelve - first chapter posted on January 8, 2018. Word count as of September 2021: over 1 million words.
5. They are Smol by u/tinyprancinghorse - first chapter posted on March 21, 2018. Word count as of September 2021: over 500,000 words.
Note that word counts are approximate and may have changed since September 2021. Additionally, there are many other notable webserials on r/HFY, but these are the five longest-running in terms of time.