Limelight (LLNW -6.8%) isn't witnessing the kind of turnaround larger rival Akamai (AKAM -1.7%) has lately seen. Shares of the the content delivery network owner are diving after it missed Q2 top-line forecasts and issued soft Q3 guidance (revenue of $44M-$45.5M vs. $47.4M consensus). Limelight's greater dependence on low-margin media delivery services appears to be a culprit. During its earnings call, Limelight said it was being "selective" in choosing deals due to capex concerns.