I thought I'd give this plugin a try and have found a small issue with it on my server.
When I set up tasks using keys other than the server's own keys and those tasks run, the server starts displaying the balance of the keys from the tasks other than its own balance.
Looking through the plugin code, it's calling "db_cache_balance" to check the balance of each task which is causing the issue because that function is used for the server's own balance. I'm curious why "db_cache_balance" is being used instead of "check_crypt_balance" which is used for everything else.
If you've noticed, you'll see transactions trying to go through from this script that fail balance checks because of this issue.