Do you show up for your friends birthday parties? How about events they put on? Is it a one way street? How many times have you shown up for your friends when there isn't something "in it" for you?
Looking back I can remember every event, birthday party, bachelorette weekend, dance competition, retreat, workshop, etc. that I've attended for friends or people I respect and admire. I can also remember those who have really shown up for me. I believe that people stop showing up when you do.
So if you want people to support you, support them.