The residents of seven villages in Thangkor town, Sichuan province, have made their pledges at a local monastery.
They had planned to use them against local authorities, but the depot was empty, he says.
The move follows an attack by government troops two days earlier against the same group.
The mostly Christian minority group denies claims that they are economic migrants, and call for assistance from the UN and NGOs.
Independent unions are not satisfied with the increase to U.S. $140 from the current U.S. $128 a month.
Bounthanh Khammavong is serving a nearly five-year prison sentence in Laos for criticizing the government online.
The award is seen by some as a slap in the face for China's government-controlled scientific establishment.
Activists are being closely watched on the fifth anniversary of the announcement of the veteran dissident's 2010 Nobel Peace Prize.