[s1artibartfast]

>The alternative is he goes public

yes, that is the threat. Yes, it is also a business transaction. The two are not mutually exclusive.

black·mail:

demand money or another benefit from (someone) in return for not revealing compromising or damaging information about them.

[aniforprez]

Him going public with... what? The API pricing? This was discussed in similar calls with all third party app devs. The pricing was going to be public anyways