Policies for recouping distribution costs (including operational costs) seem like a much more reasonable way to approach the issue without triggering a lot of unwanted side effects, not to mention just increasing taxes on VLEs.
Open data licensing has always been driven by a desire by entrepreneurs to be free to exploit public data for profit and with no responsibilities towards the source of the data. The most commonly proposed approach I have heard is to apply rate-limiting to data access and charge for PAI keys to allow the limits to be exceeded. Another approach which might be considered is to introduce copyleft concepts to an open data license, for example making initial access conditional on all derived data being published under the same license.
