100% safe for me, and is plenty of stuff
It is 50% safe and 50% unsafe, that's the gamble.
I suggest you find a reputable user to download from because anyone can post any file here and some users are malicious. Some users have good intentions but they get their resources from malicious websites.
Again, it is advisable to download from a credited user who is known to post cleanly nulled resources.
Last but not least, scan everything you download from here on websites like https://www.virustotal.com/
If you make enough money using nulls, try to give back to the community.
Good luck!
But was there some bad cases? There is many eyes on those scripts, so sooner or later some bad attempt will surface.It is 50% safe and 50% unsafe, that's the gamble.