Recuit a friend question

[Rivest]

Likely ever. Youre recruiting a person to play a game, kinda removes the point if theyve already completely started (paying for sub)

I do think it's kind of weird that my friends has to buy the game first and then enter the code.
Isn't the whole purpose of recruiting friends like this is to let them try it out for a few days?

I mean in some way I can understand why they don't do this, main account sending invites and therefor free periods of gametime to bots or something like that.
But I do feel like the free item that my friend will get AFTER they buy the game, does not want make him want to buy/play the game more.