Most opensource projects are (still) created and maintained by individuals & small groups of volunteers, not by Big Tech™. Project owners are usually thrilled & excited to learn how people are using their libraries (I know I am!), also to learn how/where to improve them. Yet, how is it still so much to ask of people to even just publicly mention/acknowledge that an OS project/library was instrumental to their own creations? Even if (some) licenses don't explicitly require this, so many users of OS code don't ever seem to see the social & energy side of these shared goods. Sometimes not for years.
Without even these minute, literally zero-cost feedback cycles (really just talking about gestures here!) it can be a very unthankful, sometimes plain frustrating, not to mention unfair and unsustainable, experience for creators of said tools.
IMHO lacking any other form of support given, the minimum social imperative for users is to at least somehow give a little nod/credit to those projects and (indirectly) to the people behind them, those who're contributing their time, experience & energy to help you (and others) along to achieve your own goals!