Luno is a trusted exchange [...]
I guess
trusted is a relative term.
I wouldn't trust that exchange at all. No reason to use an unknown exchange with low trading volume and unknown security measurements if you can use way better exchanges.
You should look at the date registered, not updated.
Oh, you are right!
Domain Name: luno.com
Creation Date: 2001-01-24T11:38:27Z
Wow! It seems they had their exchange online 8 years before bitcoins first block got mined!