Alec Saunders has a very good analysis on why free conferencing call service Foonz has bitten the dust.
Long time readers (and listeners of KenRadio's World Technology Roundup) will know well my views on FREE. It simply doesn't work. We've all heard the expression "there's no such thing as a free lunch." Well in the case of "free conference calling" the Bell is about to toll.
As Alec points out, getting paid by the rural carriers is becoming a harder and harder challenge and some telcos are blocking calls to those numbers too.
My view is simply this. If you're in business and using a free service you run the risk of this happening.