TAG does not charge one penny for their services. Most of the available filters that are most effective are commercial products that charge for their software. Those filters are not owned by TAG. And TAG does not make anything if you purchase those filters. They will install it for you at no charge.
The free filters are not as effective in being able to identify what is inappropriate for frum people and families, and block what to a goy is a normal picture of women or discussions of topics that are normal for an average goy (even child) to read, but inappropriate for a Jew.