Most indications about 'rip' (Ha... rest in peace... more like rip-off) is that it no longer works, or there are enough people out there who can't make it work, and spread the word that it isn't worth the effort. Code that is open, like that in IPTV Stalker 1.0.18, is very easily copied and modified, so there's not much you can do except get the add-on from a trusted source.
The differences between the official 1.0.18 zip and the 'rip' zip is the presence of pyc and pyo files which are executed, as well as the addon.xml. Those pyc and pyo files probably contain malware. Legitimate addons do not have pyc or pyo files included... they let Kodi compile/interpret them from the source py files.