I worked once in company (adv agency) for which it was common tactic. But market was ready for such practice (low availability of service, and large audience of potential clients).
It depends on Your product. If it's innovative give them chance to know You.
I agree with prakash be short, and show them in short why it may become useful. I would add that You will hear "no" plenty of time. Don't discourage. Customer don't pay attention, they have enough their problems.
It depends on Your product. If it's innovative give them chance to know You. I agree with prakash be short, and show them in short why it may become useful. I would add that You will hear "no" plenty of time. Don't discourage. Customer don't pay attention, they have enough their problems.
best