Complex sentence: With the loss of the 0870 numbers Powwownow faced losing 90% of their revenue, by becoming a telco it meant Powwownow would receive the entire rebate available on the 0844 numbers and maintain their current revenue whilst keeping the service free.
Split into simpler sentences: With the loss of the 0870 numbers Powwownow faced losing 90% of their revenue. By becoming a telco it meant Powwownow would receive the entire rebate available on the 0844 numbers and maintain their current revenue whilst keeping the service free.