Guild Wars 2

So what did we got whit the Pre-purchase of GW2
Pre-purchase (pay the full amount ahead of launch) any version of Guild Wars 2 and receive guaranteed entry into all beta weekends, plus three days head start on the live servers at launch.
Pre-purchasers also get a Hero’s Band item.

And we don’t get anything whit HoT?
No head start, no bonus Items?
Why do we need to buy it now but not at launch?

edit:
I bought it because I’m a fan of the game but still….

Bonus items are listed on the pre-purchase page
Beta access is also a benefit to pre-purchasing

So, yes you do get stuff

I meant the standart edition

https://us.ncsoft.com/en/news/press-releases/guild-wars-2-pre-purchase-now-live.php

The Standard/Digital Edition:
Guild Wars 2 serial code (to activate the game at launch)
Guaranteed access to Guild Wars 2 beta events
Three day ‘headstart’ access to Guild Wars 2 at launch
Exclusive ’Hero’s Band’ in-game item

so what will be the difference between purchase and pre-purchase?

beta access, the “mugumma trailblaizer” title.