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Sorry, can be I'm not able to explain my idea.
I try again.
The idea is that you can ask for funds as you do now, but you have only 30 or 60 days to collect the necessary votes, if you don't, your proposal is deleted.
You don't have to pay more for a long term proposal, everyone as a limited time to successfully have an entry level support.
Let me know if is not clear again.