Vlad This probably doesn't apply to Kagi's summarization models, but when summarizing with LLMs, I can ask them to simply omit any product placement. If prompting is not possible, then sponsorblock's API could be used.
As for why it would be excluded, it's usually not what I want when requesting a summary of a text. I want to know the main ideas the text discusses, not an irrelevant product placement for something that may not even be related to the main topic.