Your job overall will be 30 point (5 * 6) and if the current community members accept your proposal you will be new community member with 30 score. Thus from now on you earn from network treasury in proportion of your score (your score is indeed your shares). You have also voting right in proportion of your shares. You can always do new jobs and increase your shares (if community accept your proposal).
Already going to start here: the fact is that early adopters will gain higher votes and you will have to deal with centralization, regardless of whether it is benign or malicious.
This is especially true when you have that automatic acceptance rule. As far as I'm concerned, it's a negative-consequence incentive to use the coin unless you plan on overseeing many proposals, in contrast to Bitcoin's positive-consequence incentive of block mining.