The best approach to "free" things is to understand that it's never sustainable. Eventually it will have to become a paid subscription or ad supported or both.
And regardless, you're going to end up being the product if they can discern anything marketable about you from your use of the "free" product.
But just be ready to jump to the next free product.
(Obviously it's possible for there to be FOSS but that comes with some challenges as well.)