Reasons why Floyd got stripped of his WBO belt?

What belt? Floyd jr only cares about the money 

After many reminders and warning Floyd jr rather lose the belt than the money. Mayweather had failed to meet the deadline last Friday for paying the $200,000 sanctioning fee required by the WBO after he took the belt from Manny Pacquiao on May 2, 2015 in Las Vegas, in the richest fight of all time, earning a reported $220 m in the process. Mayweather was required to pay 3% or maximum of $ 200,000 to WBO but he did not care to do so. 

The rules also prohibit WBO champions to hold any belts in any other weight divisions. Floyd Mayweather is currently also the WBC and WBA champion at junior middleweight (154lb), as well as at welterweight (147lb).

So there you go, Floyd Mayweather is no longer the WBO Welterweight champion. I would like to see Timothy Bradley and Manny Pacquiao once agin in the wring for the vacated belt.