I have been wondering if it would be good for someone to set up a patreon and develop clean open source implementations of popular/current machine learning papers, and get paid for every model he/she puts out.

...and find out that most authors forgot to mention some critical details :)

Ya and like the unoptimized solution for WaveNet when DeepMind published it. But hey they published so it's cool!

You should ask for your money back.

From what they've done so far, I believe Salesforce's business model with MetaMind is to publish papers openly, but expose the code only via paid products/APIs.

There is code for some of the related papers, if you just want to play around with something, and something pretty similar at that. Here's one: https://github.com/abisee/pointer-generator

thanks!

If someone can share the other mentioned implementations it would be great!

Yeah that would be great