Upload & Sell: Off
In the "old " days, when the wedding photography industry was not as saturated as it is now, it was fairly simple to go to different hotels and venues and if your work was good, you could generally get on their list. Now, with tons of photographers, that has all changed. Everyone is trying to get on the lists. Same with wedding coordinators. They can only refer so many photographers so it takes a miracle to develop a new relationship.
Seems like a defeatist way of looking at it. Helps to have a better attitude about it if you want to make good connections with them.