He probably gets a discount for each time some one uses the code he advertises.
Happy-HG Forum
Kaios
Zainos
^ Yeah, they are our Sponsors
aesome_crafter
Oh OK because i was Going to get a server and i thought "Hey, I could use the code that HappyHG use!"
Zainos
HAHA yeah, by using the coupon code "HAPPYHG", you get a 20% discount AND it help us a lot. So if you did it it's highly appreciated <3
aesome_crafter
Lol yeah, which package did you get Zainos?
Zainos
I have some dedicated servers, but for starters like you I recommended you Crafting Table plan 
aesome_crafter
Ok cool Thanks!