Negotiating with a dictator gives a revolution time to organize. It is also a quagmire if the government adopts enough of the movement’s ideas to dilute its power, while wearing down the protesters.
Usually dictators have no intention of living up to their bargain. Their appeasement is often a ruse just to buy time. Given enough time, they will slow down momentum, identify the leaders, or just use common military tactics to divide and conquer. By playing one group against another, they can often put an end to the movement.
Outside international statesmen whose only support comes in the way of transforming themselves into peacemakers, trying to negotiate for the regime, do revolutions no favors. Their lack of understanding, unreasonable assumptions, and hidden agendas should not be in doubt.
While some of these outsiders might be sincere, consider their motives. Unless they are fully committed to your cause, they are more likely grandstanding to the rest of the world, or supporting the enemy.
Do not give credibility to those whose words are meaningless. The time spent with them is usually wasted.