Also It could be used to remove 'bad old' concepts
like - 10 votes = your concept is marked for deletion in 2 weeks, if you change it in any way - counter resets also.
We have a 1000 of concepts ATM.
by bad concepts i mean something like 'common quick zero cost enemy tower -20' and so on
edit: also there could be a "list of the week", randomly bubbled up from the whole concept database, to remind about some 10-20 old concepts.