When you support an Idea, you show that you would like to see it implemented. You raise awareness for it by your support. The Idea's π₯ interest increases, which makes it more visible to other people, and more likely that people will draft Solutions for it.
You also have the potential to earn π funder rewards for creating or supporting an Idea.
Each time you support an Idea, you create a position in that Idea.
An Idea Position
When you withdraw from a position, you receive your original contribution, minus any π funder reward and anti-spam fees you paid, plus any amount you earned from π funder rewards.
The default π funder reward for Ideas is 10%. The anti-spam fee is typically 1%.
Multiple positions
Because the earning potential of a position increases over time, when you add more support, you create another position. Each position must be withdrawn separately.