Complex sentence: To make such investments pay off, scale (i.e. a large number of customers) is needed, and led Neuf Cegetel to acquire several ADSL-based Triple Play operators (see previous section) to increase its market share.
Split into simpler sentences: To make such investments pay off, it is required to achieve scale i.e. to have a large number of customers. For this reason, Neuf Cegetel acquired several ADSL-based Triple Play operators (see previous section) to increase its market share.