Well January of this year was a really good month at OSBot for me personally, and there were only 13k average people online playing OSRS, so once again I don't think it's dying what so ever.
Proof of player count:
https://web.archive.org/web/20140125091309/http://oldschool.runescape.com/
EDIT:
Better representation:
http://www.crystalmathlabs.com/tracker/players.php
So yes it did have more players during launch, though the declining numbers didn't seem to effect OSBot very much, until these recent events(OSBot 2, MIA Devs, Crazy Drama, and Bans); which leads me to believe that RuneScape is not dying, and is not the reason OSBot is where it's at right now.