I used 'fraud' before. It's perhaps not the most legally accurate term.
In the U.S. there are laws against unfair and deceptive business practices. Here's what my search engine supplied.
'Federal and state law prohibits businesses from engaging in activities that are “unfair” or “deceptive.” The key federal law on this subject for most businesses is the Federal Trade Commission Act, enforced, of course, by the Federal Trade Commission.'
'Deceptive business practices generally involve misleading a customer into believing something that isn’t true through misrepresentation or omission. In contrast, unfair practices are likely to cause or do cause substantial damages to consumers in the form of financial loss or physical injury.'
IMO, the FAQ's would be evidence of 'deceptive'. Unfair would be the financial loss of companies and induvial that became reliant on the OGL due to WOTC's misrepresentations only to have it ripped out from under them. For example, if a large bank had a contract with their customers (say an account where the fine print allowed some loop hole where they could update the terms and charge fees but they advertised no fees ever), there is no doubt in my mind that the FTC would rightfully hammer that bank if they tried to charge those customers those fees on those accounts.
Would these laws be applicable in this case?