[foota]

A company has no incentive to ignore the customer, all else being equal, but they do have costs in servicing the customer and costs from ignoring the customer.

Assume the company has no way of distinguishing "valid" or "high impact" cases from other cases. This means that in order for the company to handle cases they need the sum of fully treating every case to be greater than the sum of the cost of fully treating every case. This is almost certainly never going to be true, unless each of your cases is high cost to ignore (think enterprise support).

So you need to funnel down the cases. Typically this is done with low tier support that tries to suggest fixes and such. You can also offer high value added support to give customers the ability to pay for a support plan. This $20 proposal is like that but on a more ad-hoc basis.