Because of the sudden critique influx I'd like to give my opinion as both an author and someone who has struggled with attempts and suicidal ideation since I was 10 years old.
Personally I think it's a dangerous path to start spearheading this idea that suicide can only be used in a specific, serious, moral, or otherwise deeply just way in fiction. Even in real life suicide does not present in one way. It does not happen for one specific reason.The happiest person you know could be suicidal, the most depressed could be, the most awful morally fucked dude, your cousin Frank who has a wife and kids and corporate job, your neighbor down the street with the big house, even young children can be suicidal. And each of them have their own reasons for feeling that way. Some which you would never even realize were feeling that way. Suicide does not have a symptoms guide.
I just think it's cruel to call suicide of any kind in fiction wrong, as it implies there's a correct and incorrect way to be suicidal in the first place.
I do think some of you have points beyond that though; the warnings should have been in a more obvious spot from the start, and using a character's death to get interaction is not the most well thought out course of action. Though from the very bottom of my heart I don't think Jenny did that with the intention to hurt or profit from suicide, only to grow her game.
Just my two cents.