Hacked/Useful blocks from multiple sources, without all of the blocks you won't use. . Also good if you have an device that can't handle the projects with too much blocks. Your project COULD be marked as NFE as long as you don't use hacked blocks, so it won't be on trending or be on the front page.
(The ones i made myself will say so in it's comment.) Found hacked blocks at https://scratch.mit.edu/projects/382631312/ The when is true block was found here: https://scratch.mit.edu/discuss/topic/867002/?page=1#post-8989913
