The users themselves. Everyone that use cracked software know the binaries could potentially contain malware, so the people that share these cracked software need to build trust from the community before being called “safe” and get recommended. If ten if not hundred of thousands people use the binaries from a specific “site” or “repacker” without ever getting a virus, then it’s most certainly safe to use/download. Fitgirl is the safest and most known repacker ever (as long as you download from the official site and not some shady copycat, that is)
If You can afford to pay, then cool. Most people that pirate can’t afford the games/apps anyway, so it’s not really a matter of asking if it is safe to pirate but what site are safe to pirate from. Also, Pirates tend to be tech savvy from getting screwed a few times when they were younger (Ex: me), so a good chunk most certainly know how to detect viruses.