i met this problem too .most of time ,when the customer need to know the quotation and specific information,they seem urgent. but after you send the information they need and talked with them ,they become indifferent and seem have no time to talk with you or respond to you less and never focus on the product again.
Hope everyone have a good attitude in the net business.but you can build a impossible opportunity.Good luck!
Hello!
Here i find the same problem, but i'm sure that's because of the timezone.
Good luck