I'm really curious if there has been a comprehensive study on incentive corporate tax breaks like these. It has become my understanding that these are rarely worth it.
A tax on gross receipts is going to discourage any big business from locating in the city. You shouldn't ask "what incentive of these tax breaks" are, but rather "was it worth have Twitter/Google/Stripe/... downtown" or not.
Reminds me on this very interesting video on the subject focusing on Louisiana (https://www.youtube.com/watch?v=RWTic9btP38)