Both the BI article and the NYT article it cites appears to be only able to quote the same 2 people. Now I know BI has a pro company/anti-worker agenda and I know NYT can be neutral on these matters. What I can't find in either are any numbers.

So I looked at Glassdoor[0] and the trend looks like after 8/2015, when this article was published, there is a sharp uptick in employee reviews. So far it appears almost everyone is happy with the change (customers, employees, and management).

[0] https://www.glassdoor.com/Reviews/Gravity-Payments-Reviews-E...