Yes if you are brought up without manners that is the way to ask
Sorry don't understand what "manners" you're talking about - the guy stated that he needs help - do you expect him to beg? Or crawl on his knees?
jeroen and max did the right thing - they ADDED players (or if the players were already in - posting the link would be enough) - the guy would've understood he needed to subsscribe, or if he's a subscriber - would've gotten the info.
What's the point of scaring a potential subscriber, do you think anyone would want to sign up, if any time they ask for info, they are rudely told to f@ck off?