For me it is when companies/services market themselves as donating to XYZ cause if I buy their product. If they want to donate, they should have already done that with the money they have. Asking me to give them profit so that they can donate is so obviously pretentious.
Especially when they sign me up for a bunch of different emails lists I need to unsubscribe from each one individually and eventually just spam everything from them. Then they sell my email.