Because WM has a PROFITABLE BUSINESS. They had 1/2 billion in operating profit last quarter on revenues of 3.5 billion. Last year they threw of 2.5 billion in cash from operations.
JBI is losing $20 or more for every $1 of P2O revenue- even more if you add in corporate costs. They rely on discounted PIPEs to fund the business and look to be doing so until the PIPEs say "enough is enough". Then they may have to turn to death spiral converts.
And this doesn't even account for the SEC and class action suits, which were settled years ago for WM, but are only just starting for JBI.
"The world is a dangerous place, not because of those who do evil, but because of those who look on and do nothing."
-- Albert Einstein