Before Facebook bought WhatsApp it actually used to require a small annual fee, but it was removed.
Alas, I fear that as tends be the case with advertising companies, they know that the willing to pay users are the most valuable advert audience, so are unlikely to give anyone an option to opt out.
On an unrelated note, I wish that YouTube offered a "no adverts" subscription option, I don't want to have to pay the full price for their premium package when I watch very little YouTube and the only thing I want from it is the lack of adverts.