1. 支持 are rewards 给 由 other 潮流粉丝俱乐部 members for your contributions. Say 你 added a good video, someone might give 你 a 支持 for videos, 或者 if 你 answered a 问题 well 你 could get a 支持 for answers.
However, people also give 支持 randomly, just stuck onto 墙 messages saying "hi" 或者 "thanks for the add". People also give 支持 as rewards for winning competitions.
2. To give someone a prop, 你 first go to their 个人资料 and scroll down the page til 你 reach the end. There, 你 can post a message on their wall. 你 write whatever 你 want to write in the white box - no one can give a 支持 without a message - and click on the 秒 little image box beneath it then select the 支持 category 你 want. Then 你 just click Post.
Ok there are two parts to this question. 1)To send 支持 你 go to the person 你 want to 支持 page and click on props. A small text window will answer and 你 type what 你 want.
2)Props are many things; People use them to keep in touch with friends...others use them to complament others on their pictures, their stories, etc.