Au contraire, to me it feels a lot like Matlab re-done from scratch, but getting it right this time. The language is as pleasant as Python to work with, and it has none of the Matlab syntax abominations and unexpected performance bottlenecks.
You'd be mostly benchmarking the quality of the underlying BLAS implementation. All these languages call the same blobs of Fortran and assembler code, and the performance of the glue part is insignificant once you have a matrix larger than 100x100.
The same reason why you can't steal an already-published idea: your paper is publicly available and timestamped on arxiv, so everyone provably knows that it was your idea first. Moreover, a google search will likely reveal your previous contribution.
The problem is that mr. Joe User cannot (and shouldn't need to) verify whether a website is legal or not. How am I supposed to tell? "Hey, mr. Apple iTunes, could you please provide me a signed notarized copy of your agreement with Katy Perry to prove that you are selling her music legally?"