see poll in February:

• Should there be a minimum vote weight required for foundation polls?

• the most voted answer was: "yes, 20% minimum vote weight required" (with 27.8% of the voter shares)
• aggregated: 20% or more vote weight wanted by 56.85% of voter shares

aggregated details:

• 50% or more wanted by 1.6% voter shares
• 25% or more 29.07%
• 20% or more 56.85%
• 15% or more 62.49%
• 10% or more 83.86%
• 5% or more 94.44%