Why would you assume they are doing it for fun? Most buyers don’t want to waste time. I get a lot of people who message me to ask a question and if it’s a very simple question, I imagine they are making sure I can really communicate in a language they understand.
If I were to consider ordering from a seller with less than 10 reviews, I would probably contact them first to make sure I’m not going to get an unresponsive seller. If the seller was new with no examples and few gig images to show me what they do, I might ask if they have a portfolio. This is not uncommon in the business world. If you are a well established seller with over a thousand reviews, lots of gig samples, and recent deliveries in the same day or so, I can understand not wanting too many messages. If that doesn’t apply to you, though, messages can turn into sales at any time.
This isn’t meant to sound harsh, but it’s just the way freelancing sometimes works. No messages and no orders means no money, so answering a few silly questions shouldn’t be a big issue at that stage.
Edit: Sorry, I forgot to address this -[quote=“anjum_saba, post:1, topic:123798”]
I provided them their list and requested them not to knock me just for making a fun.
Why they do it? Is their any negative effect on my profile if they complain it to CS?
If you worded your response in a way that the potential buyer considered abusive and they report you, then Customer Support may give you a warning. If you have no clear proof that someone is contacting you for fun, I wouldn’t use that wording, and I wouldn’t use the slang phrase “knock me” in professional communication.