Extraction Unlocked -- pe-wiki wrong?

[KeyFreq]

I just unlocked extraction today...yay!

Pe-Wiki says that it unlocks at 2400 Mining, but I unlocked it at 2534. The other recent unlock-posts I have seen on the forum were also above 2500. Perhaps the skill unlock level was raised?

I went to update pe-wiki...but their page is down atm. I'll try later

 

[Snowy]

I just unlocked extraction today...yay!

Pe-Wiki says that it unlocks at 2400 Mining, but I unlocked it at 2534. The other recent unlock-posts I have seen on the forum were also above 2500. Perhaps the skill unlock level was raised?

I went to update pe-wiki...but their page is down atm. I'll try later

I unlocked the Extraction about a month ago and atm I have 2440 in mining, so it must be something other that makes up for the difference.
Maybe also drilling is involved. I read the same info as you.