You only ever vote 3rd party but you wanted them to try to target you? Seems like their targeting tech was actually working in your case.
EDIT to reply: That category, yes, but within that category it makes sense specifically to exclude your subcategory: the ones who would never vote for either me or my opponent. You are essentially irrelevant to my outcomes and I'd be wasting money and time paying attention to you.
Wouldn't it make more sense to target everyone who doesn't routinely vote for your party?