It seems like he is too proud with his site and the code while in fact is that this site is barely touched or known around here . With his statement here, he is digging his own graveyard for his site because +30 % means a bad things for his investor as well .
On the other note, he keeps on luring you to "exploit" the site which means that he will log through your games and finds out how you did them. This is such a cheap way to not pay the bounty


Regarding the bolded part, it seems like he is always hostile in tone even to his player ( which is something that a site owner shouldnt do )