can someone explain the "business arrangement" they made with tweetmeme? will tweetmeme get their data in exchange for showing them how to build this? (they say

can someone explain the "business arrangement" they made with tweetmeme? will tweetmeme get their data in exchange for showing them how to build this? (they say the new code is 100% original to twitter though).... also curious as to why twitter didn't BUY tweetmeme.