How are financial transactions not free speech? If I want to be able to BUY A PRODUCT or to DONATE MONEY I should not be forced to disclose any of that information to a government agency just because they want to know what I like to buy, read, use, whatever.
That is absolutely free speech, ultimately all of the freedoms that people think are important are completely useless and fall flat on their face if the most important freedom - freedom to earn money, freedom to spend money is not actually protected from government oppression.
You think being able to spend or earn money without being oppressed is somehow outside of individual freedom protections because it's money? Money, time, any possessions are worth nothing if you do not have protections against government oppression, which means you cannot be protected from government taking anything it wants away from you, preventing you from doing stuff to earn a living (and I am not talking about harming others while earning a living, that's the purview of criminal justice system).
Being able to stop you from advertising your services because some government official wants to own that piece of business for himself or for a donor... THAT is what individual rights are - protection against government oppression. A right is protection against government oppression and only government oppression. A right has nothing to do with transactions and dealings between individuals and / or companies.
Why is that? Because government is an institution that has supposedly legal and legitimate power to oppress you! No corporation, no other individual has legal and legitimate power to oppress you. A private individual (or a company) oppressing you is a matter for courts and justice systems, but a government oppressing you is a matter of policy and governance and nobody in government will ever be punished for oppressing you, so you have to prevent the oppression from happening, you cannot rely or expect retribution after the fact.
The only meaningful individual rights have to do with preventing government oppression against taking your stuff and your freedom and your life.
Any move to deanonymize any activity that has nothing to do with harming others is a move towards government oppression.