I started reporting every hacker i saw on purgatory starting May 7th, At that time there were 1103 Unbans on purgatory, and after spending the entire day reporting that number stayed the same. For the next two days i had continued without much sleep making dozens of reports. Only on the tenth did a player earn one, This got me thinking, if it took three days for 1 legit player to earn an unban, how many hackers could earn one in the same amount of time. So i took a break from catching and reporting hackers for a few days and I came back to find that around 4 players got unbanned.
This data is not perfect, but it does make you question things.
There are tons of factors, with the right strategy you could possibly do it in 24 hours or less. With the addition of trollers, and a destroyed spawn it makes things difficult.