Another important pattern I've seen is that products, in the long-term, morph to take the form of their revenue model. Many personal finance products are free, but make money by selling data or trying to upsell you on something else that you don't need (like, say, a credit card you don't need or a tax product that is overpriced [2]). This is what happened with Mint. It became a "top-of-the-funnel" lead generation tool for other products.
This also explains a lot of the problems with the internet at large today—misaligned business models. I'd definitely encourage anyone joining (or starting) a company to think about what the revenue model they are choosing means for the product and company long-term. Every company will say they are different, and that they actually care about their users and about building a good product... and maybe in the early days, the original team can stay true to that, but eventually time and money take their toll.
Companies that really want to build lovable, user-aligned products, set up a revenue model that encourages them to stick to that long term.
[1] https://www.monarchmoney.com [2] https://www.propublica.org/article/inside-turbotax-20-year-f...