Text only???

No offense to anyone and I'm not Sayin this is the wrong way or the right way but... What's the difference between a text and a mandatory email address to sell a dog. I'm not being a turd about anything, this is yalls sight y'all have the right to say yea or nae and I personally enjoy it alot. I'm just curious because an email isn't talking either? And most that I have read says never check after they put thr address up. Not trying to cause any Problems I'm just curious. I myself do post mostly on the dog trade but if ya look on it under my name it is usually the same dog or if not it's very far between the two. I catch pigs with my dogs but that doesn't mean I hafta post them in the dogs on hogs to show just because I wanna move a dog. My dogs arent 1000 dollar dogs but they do catch a pig once in a while and run a deer at times too. Lol