For me, compersion results from a underlying concept of Abundance rather than the perception that things are limited.
I have come to believe that things like love, lovers, chemistry and charisma (to name a few) are abundantly available as long as we are open to experiencing them.
This concept has helped me in running a business also, since I do not feel threatened by my competition. There is enough business to go around for everyone!! Sure, the market changes and the economy affects things, so you have to be open and flexible, but the abundant availability of things still seems to prevail.
There is enough love available for everyone. There is enough pleasure available for everyone. It's just a matter of expecting it and being able to experience these things when the opportunities arise!
The key to life is in being fully engaged and peacefully detached simultaneously and authentically in each moment.