Affiliate disclosure
Some comparison pages can carry affiliate links. When one does, the link is marked rel="sponsored nofollow", the disclosure sits next to it rather than in a footer, and the table says plainly which rows pay a commission and which do not.
Calculator results are never adjusted to favour an advertiser. The engines do not know that advertisers exist.
If a page ever carries sponsored content, it will be labelled as sponsored at the top, not at the bottom.