I am no customer of nullz, but i am in his discord following his updates. What i have seen so far is a very responsive and structured Person. The posts about Malware in this Thread are pretty funny. Its is normal that Anti Viruses flag obfuscated Code as Virus. Not all Anti Virus will do that, but many will.
There is nothing fishy about nullz or the bot that is advertised here. And there is nothing wrong about newly registered People commenting on a Thread. Most people google Lost Ark Bots and find the epvp forum threads and want to support the dev of their chosen bot
what i have seen of the bot looks good, my favorite feature - just from observing - actually is that the bot shows some sort of Stats while you run it. It counts your run-time and how many Dungeons he cleared successfully. Really cool thing