I got unbanned from MW2 some how

So I was doing some hax in mw2 and I got banned because I did something wrong I guess. then a year later today, I got unbanned? I thought it was hacking bans are permanent?

Do other people get perm banns? because I still see the vac ban thing on my steam

Ya bans for hacking are always permanent, so I wouldn't complain about it because steam rarely lifts any permanent bans.