[thephyber]

I don't envy your position.

Your stakeholders have all been burned before either personally or by other vendors and you will have to somehow built trust against those mental barriers.

I personally treat any company who can access my information as if they are willing to undermine their previous statements, have non-public contracts which sell/trade my information with disreputable companies, can pivot in a moment of desperation to do everything they previously promised not to do, may be M&Aed in such a way that all previous contracts are significantly modified, could have terrible security controls of their data, or may not actually delete all copies of data when they say they do.

[csteubs]

That's certainly a good rule of thumb.

The mental barrier is difficult to overcome, and you can't win them all. Distill the message too much with "We make money by selling data" and you'll never see a customer, but the opposite is true as well; "The startup doth protest too much, methinks"