>I don't have a contract with the advertiser to provide genuine data back about what ads I've clicked and what I haven't.
Charges of fraud doesn't require a contract to be in place. That's the whole point of criminal law, it's so that you don't need to add a "don't screw me over" clause to every interaction you make.
How is that a fraud, when I don't get any money from the scheme?
Gaining something isn't required: https://en.wikipedia.org/wiki/Fraud#Civil_fraud
By this logic, vandalism would be fraud too.
Vandalism involves making material misrepresentations?
Damaging property cost money to fix.
Where's the misrepresentation?
Where is the misrepresentation in clicking on links?