After a spate of news stories about alleged “astroturf” advocacy in a contentious U.S. net neutrality debate, the IDG News Service looked into the funding transparency of several think tanks and advocacy groups involved in the issue. Several disclose limited or no information about their funding.

Astroturfing is commonly defined as a lack of funding transparency, paired with the appearance of grassroots support.

The IDG News Service looked at 14 of the most prominent think tanks and advocacy groups involved in the debate. The following list is not exhaustive, however. It does not include some small organizations, and a handful of groups that have joined the conversation recently.

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