The sellers are aware that their sticks might be used for dubious reasons while one ad even encourages the buyer to use it to play a trick on their families or force a boyfriend to ask the question.
One buyer from Los Angeles said that she wants to use the test to gain revenge on her ex-boyfriend. "We had been trying for another [baby]. He texted and said he isn't sure who he wants to be with and I think I handled it well for what a cheating lying dog he is. I would like the last laugh out of this. I will give some girl $40", the buyer wrote.