You show me yours,
But I won't show you mine.
We all know the deal is this: You show me yours, and I'll show you mine. It's an even exchange in which one party goes first.
But when it comes to how associations and companies poll/survey their stakeholders, it's a one-sided bait and switch. We're asked to show our thinking, to give our insights, but generally get nothing in return: no summary of the survey results so we can learn what others were thinking, and no explanation of what actions will be taken in response to the input.
While not everyone will want that information, many might find it desirable. And you have nothing to lose by sharing it unless ... and here's the big if ... nothing is going to change.
To receive more input, provide more output. Close the loop. If you want others to show you theirs, you need to show something in return. Doing so may create more loyal and engaged customers and members because they know their input matters, it influences decisions.
But you'll never know if you fail to show.