Properly want to vet ideas a bit before executing.
Quick, iterative feedback is by far a superior approach when attempting to understand how to build a successful product.
Building and failing and building and failing might be a faster way of getting to something great than vetting, vetting, vetting, building, vetting, vetting building...
Building hundreds of AviSynth filters won't bring in a cent.
On the other hand, if you are having fun and learning something along the way, who cares?