I notice a bug 

I get many error everyday like this:

[Sun Jul 2 14:01:38 2017] [ow_core_log] [Notice] Message: Undefined offset: 6845 File: /home/mysite/public_html/ow_plugins/user-activity-motivator/bol/service.php Line:121

one more smaller issue:

I notice the credit timer is not stops at 0 when it is "counting down"

it is continue and start counting - minus values (-1,-2,-3-10-100 and so on...)