Unless you're bored and just like to draw, you should read my post again. $1600 is probably the profits from about ~200 accounts. Not counting the resources (programmer time) that would be consumed to make such a system, do you think 200 accounts would be created or maintained by introducing a new shout system? SE is a business. If the improvement you're suggesting doesn't offset the costs, it won't be implemented.
If you want your suggestion to be implemented, couple it with a technological solution that will offset the cost of implementation somehow. For instance, say you look at the program and notice that messages sent are always coded as 256 bytes with a bunch of null characters instead of a more efficient variable-length solution. So you suggest that SE start encoding message length and shortening the message sent, saving them a large amount of bandwidth every month.
Say you realize that all characters are not used at the same frequency, so you propose a more efficient encoding scheme, where less common options require more data to transmit but higher frequency options are encoded more efficiently, thus reducing the effective bits/character.
Consider reading the "Efficient Encodings" part of this page:
http://www.cs.cmu.edu/~dst/Tutorials/Info-Theory/