Is it true????
It used to be hard/impossible to crack CS:GO because of its CEG protection. But Valve removed this protection for whatever reason. Since then it's very easy to crack it.
Only remaining problem I see here are patches, because Valve often updates the .vpk files, which are big (>1GB) binary files. That's the reason we don't have a Setti CS:GO release yet. For our CS:S release I wrote a script that created delta updates, so the (cumulative) updates were small, but this script was 1) not fun to maintain & 2) got lost over time due to a pc crash. I personally don't have the time & the motivation to work on a new (and better) script for the reason Silent explained.
Other releases solve this problem by
a. creating big updates that included the whole .vpk files
b. implementing auto-updating feature, downloading the whole new .vpk file, so the bad update design was hidden from the user
c. providing no updates at all
I guess that methods a&b are fine for most users (especially b.), but I wouldn't implement them.