This shouldn't be a surprise to anyone who follows politics, even slightly, or to anyone who enjoys the antics of the good Reverend Al.
Look, he is entering the Presidential race knowing full well he has no chance whatsoever of winning it.  The appeal and underlying reason for his running is the money.  There is mucho, mucho dinero involved in politics, even more so in a national campaign.  Lots of loop holes and rooms for lying, thieving phonies such as Sharpton.  He needs to line his pockets and there isn't a bigger payday to be found anywhere.  Can anyone tell me the last time this pompous windbag was legitimately employed?
I say let's sit back and watch the circus.  It'll be amusing and, even better, will divide and damage the Democratic Party.  
Personally, I'm still hoping to find that photo I know exists of Al and Hillary rolling around at some Westchester Motel 6 in a fiery passion.