Wow, I really like the implication in the word "porn". At first I thought the analogy was clear, it's supposed to express something that excites us. Like food-porn, or word-porn, etc. But there's so much more you've explained:
They make it worse by helping people accept less and less in return for their time, effort and money, in the same way that porn and Tinder help people accept less from their relationships, turning everything transactional and short-term, rather than developing and evolving together.
This really sums it up so well. Short-term and transactional, which is also superficial, reductive, and ultimately wasteful. In fact, "porn" is the most appropriate term I can think of to encompass all this.
We are tricked into believing the useless has value, while giving up our rights to the useful.