  We study, via numerical experiments, the role of bound states in the
evolution of cosmic superstring networks, being composed by p F-strings, q
D-strings and (p,q) bound states. We find robust evidence for scaling of all
three components of the network, independently of initial conditions. The
novelty of our numerical approach consists of having control over the initial
abundance of bound states. This indeed allows us to identify the effect of
bound states on the evolution of the network. Our studies also clearly show the
existence of an additional energy loss mechanism, resulting to a lower overall
string network energy, and thus scaling of the network. This new mechanism
consists of the formation of bound states with an increasing length.
