I’d like to add to the sentiment of this post by saying that if you ever used any of those amazing websites, I’m sure the developers will highly appreciate it if those with the means could consider contributing to their projects.
We all know how greedy and shameless YouTube can be, and yet those developers give us incredible products for free. And if you ever saw the entitled requests of some users on their projects’ pages whenever YouTube implements some changes, and they have to rush to fix their code, I’m sure you would appreciate them even more. I’ve personally seen quite a few projects being abandoned because of the sometimes thankless job of being a developer, and I would hate it for any of these to suffer a similar fate.
So if you can and are willing, feel free to join me in contributing to: