eFax forced upgrades?

I got an email from eFax informing me that I had exceeded the amount of incoming faxes allowed by the free eFax account I have. The limit is 20 or less per month.

I called efax to ask how could I receive faxes if I have never given out my free efax number?
Well they explained that some companies are in the business of harvesting fax numbers. They dial a prefix and keep dialing until they hear a fax tone. The company will then accumulate thousands of fax numbers and sell them to marketers.
Well – now I know.
But I do wonder, is efax investing in these companies (fax spamming) or doing it themselves to get customers to upgrade their free accounts to paid accounts?

The following two tabs change content below.
Ramon Ray, Editor & Technology Evangelist, Smallbiztechnology.com . Editor and Founder, Smart Hustle Magazine Full bio at http://www.ramonray.com . Check him out on Google Plus, Twitter or Facebook