Yeah either you tell clearly if you want to sell your software or if you want to give it away for free then opensource it . There is no point in hosting some obfuscated code in github pretending it to be open source and then using that to push your little startup venture. Being upfront will win you trust.
If you're reading this: GPL2 means anyone is free to copy, modify, and redistribute your software. That means that they can unminify it, give functions meaningful names, and yes even remove the localhost restriction you've put in place seemingly in an attempt to monetize.
If your goal is to make money off of this, I suggest you take down the repo and put up a new one under a closed source license. You can still distribute the minified file for people to test with, but people would no longer have both legal and ethical justification to release a more "friendly" version.
If your goal is not to monetize or maintain control for some other reason, then I would suggest uploading the unminified version as it will make it much easier for people to contribute back.
(And to be clear, anyone who has already downloaded the repository has GPL rights to that code forever, you cannot (to the best of my knowledge) revoke that license. So if you do see an easier to use and less restrictive fork, well, you live and learn I guess, nothing else can be done there.)