Well, Adobe offering their toolkit as a cheaper, monthly cloud offering. That is because lots of people cannot shell out $2k upfront for their tools. You are doing similar thing with Matlab. How does it and why do you think you failed?

YC failed to see the future potential of your business because they are looking for the quickest and best bang for the buck obviously.

If you're passionate about your business model, keep going and ignore naysayers who cannot assist you.