Zoey had an incredibly strong sense of possessiveness. Once she identified someone or something as hers, she didn't like others trying to take it away. If anyone dared to compete with her, she would become obsessively focused on that thing. Rick had often hinted to Zoey that his sister, Rita, might have feelings for him—just to trigger Zoey's possessive instincts.
So, after considering all the clues, Meow.Q seemed the most suspicious. The terms they offered and their identity were questionable. If she were in Zoey and Rick's shoes, she'd also likely find a connection to Shadow.Q, but since Shadow.Q wouldn't personally get involved, it made sense for Meow.Q to be the go-between.
Rita didn't bother to check other threads for analyses debating if she was being scammed. She simply turned off the comments on her post. If the next day Zoey really showed up, it would be proof of her sincerity. Rita swore she genuinely hoped Zoey and Rick could secure the dragon.