Note to artists & creatives: You don't have to give away your rights in a contract, so don't.
Up until a contract is signed, nothing is set in stone - which means you can and should push back against anything you don't think is right. This can especially be the case with zombie clauses - mindless rights grabs of the content you create that let the organization you're contracting with (and anyone who they choose to share it with) use it however they want, in whatever way they want. Take this clause from a contract that was asking to use some images for a publication:
"1. I give and grant in perpetuity to XXXXX and their respective representatives, agents, licensees, successors and assigns (herein collectively called “Licensed Parties”) an unconditional, nonexclusive, worldwide, royalty-free, irrevocable license and right to use my name, image, biographical information, performance, voice, photograph and likeness (collectively, “Image Rights”) in all media and content whether now existing or later discovered or invented, prepared for or by the Licensed Parties for any and all types of advertising, publicity, marketing, promotion, exhibition and other purpose that is connected to XXXXXX’s respective charitable missions."
That clause is like asking to borrow my car for a grocery run, and then claiming that you have permission to drive it to the Grand Canyon, set it on fire and push it in. And the people sending you the contract might not even realize that, they might be lovely people who would never do that to your car. They probably use this contract because a lawyer wrote it that way to try and extract the most possible value, and they mindlessly copy and paste it and take it as a given.
But you don't have to take it as a given. In fact, you really shouldn't, especially if you are simply licensing some of your work to someone for a specific project. Instead of signing that contract as is, here's the clause that I replaced it with:
"1. I give and grant to XXXXX (herein collectively called “Licensed Parties”), nonexclusive, worldwide, royalty-free, limited license and right to use my name, image, biographical information, performance, voice, photograph and likeness (collectively, “Image Rights”) for THIS PROJECT, on the condition that description of the project and photographer credit as supplied shall accompany any and all uses of the Image Rights. License for any further use, or creation of derivative, commercial, or promotional materials are not assigned without explicit further consent and appropriate recognition."
The replacement clause limits the scope of use to the specific project, gives the conditions for use, and says that any further use has to have explicit consent, and might be subject to future conditions like payment.
Now I'm not a lawyer, and this isn't legal advice, but it it comes from working on my own projects, and watching friends deal with these kinds of zombie contracts that crop up everywhere and want to eat your brains. They can come up at any point - after you've agreed on a scope of work on rates, simply because if you're not paying attention and looking out for your rights, you can't assume that anyone else is.