Why would I want to pay $0.10 per minute for toll-free if I can use the standard services for free?

Many of our users want to host conference calls for their clients or guests and don't want their participants to have to pay long distance charges to access the conference.  Also, it may be more convenient to put the cost of the conference call onto a single credit card bill rather than paying via separate long distance bills for each caller.  Many people have found our low per minute rate to be even cheaper than the rates they would pay for regular long distance.