To be fair, I do use some of these services, too (carefully). But, that’s only because often I can’t find quality alternatives. For instance, I would pay for a high-quality service like Mint (I don’t use it) that kept my data private, but there is none.
Since gathering / ad-selling services are so lucrative, they essentially subsidize the development of the highest-quality products in the market. The best engineers work for these companies. They have massive teams of people refining their products. And, these companies use IP laws to prevent clones. Essentially, they lock out for-fee competitors.
Because of this, I’m a strong supporter of consumer protection laws and regulations. Capital often flows toward deceptive and unethical practices. And, all companies are eventually forced to follow the leader, otherwise they disappear. Laws are the only ways to prevent this.