Creators decide individually if they allow the script to be downloadable or not. If there is no download button, it means the creator decided to not let you download the script.
Site is live for several months now and is doing pretty good.
https://faptap.net/
And for the “if someone would steal my script and upload it somewhere”. This is not possible on FapTap. Only the creators themselves can upload their scripts. If you find script from other scripters, it is only, because the uploader got the permission (for example: https://faptap.net/u/ScriptsFromThePast)
Also, for further discussion, please use the current thread: https://discuss.eroscripts.com/t/faptap-watch-free-interactive-porn-in-your-browser/81625