So what and how much exactly was offered to Amazon?The MEDC [Michigan Economic Development Corp.] won't reveal the numbers declaring them a 'trade secret' that would require Dan Gilbert's approval to release.

From Crain's Detroit Business:
Chad Livengood, reported this week that the MEDC is keeping secret the tax incentives offered to Amazon for an economic development project in Detroit that never materialized. Despite an impressive regionwide effort led by Gilbert, Detroit didn't make Amazon's list of finalists.

When Livengood requested the incentive figures, the MEDC cited a Freedom of Information Act exemption that protects trade secrets from public disclosure if the information is submitted under a promise of confidentiality.

In fact, the MEDC had promised confidentiality to Gilbert's Rock Ventures.

In a nondisclosure agreement signed in 2016 — before Amazon announced its second-headquarters sweepstakes — the MEDC promised to keep secret any commercial and financial information provided by Gilbert's companies while the agency considered incentives on his potential projects. The broadly worded NDA expires in 2019.
Do we have a right to know this or is it to our advantage to keep it secret by not tipping our hand to future projects?

It also raises questions about whether Gilbert and Rock Ventures are getting special treatment from the state, and why the state is keeping secret incentives that it and the city of Detroit had offered. Public money was being offered that would have benefited Gilbert, but the public isn't being told how much.

This will likely also reveal what Gilbert stood to gain. He get out in front of this and release this immediately.