As I said, I don't see how proportional fee could work in this case. Give me some numbers :tongue: Here are mine:
Let's take fernando
's proposal of 30 DASH reimbursement as an example. 1% of 30 DASH would be 0.3 DASH. If 30 DASH was the legit proposal (i.e. it was >= the lowest limit) than what would stop me from submitting 100 of similar proposals for only 100 x 0.3 = 30 DASH fees combined? We have 10-15 proposals now, imagine the list when someone just made this number 10x higher. Smart one would also give them names very similar to legit proposal to further confuse people....
Next let's see how we could vote them out. To bring one proposal down you need at least 10% of network "No"s i.e. ~350 votes. So to remove 100 of spam proposals you would need to broadcast (and store in MNs memory for some time) ~350 x 100 = ~35K votes. But how much is it? Well, all current proposals have only ~22k votes combined.
And that is what can be done for only 30 DASH. Imagine that someone is willing to spend 300 DASH (~$2k at current rate) - 1000 proposal and 350K votes to clean them all.
There is no way our current infrastructure could handle that many votes at a time. So in such extreme situation one possible solution would be to do nothing at all and let there be thousands of meaningless spam proposals instead of trying to fight them. Another one would be to coordinate people and vote spam proposals down one by one. But then, again, it's only 0.3 DASH (~$2) to bring another one online, so it's way to cheap to attack and it's way to expensive to defend (remember to count people's time here too).
Now compare that to 5 DASH (~$35) for a single proposal and 5000 DASH (~$35K) for 1000 proposals. You need to have really strong incentive to throw away that much imo.