Put it this way, if you derive pleasure and happiness from something, pay for it. Much like going to a movie, for a drink with your friends, buying a book, a ball, a toy, video game machine and software, etc., all of which don’t generate income and you can forgo without your basic necessities in life getting affected. If Blender makes you busy and happy, think of donating. You don’t have to, but think about it.
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