Steem mining right now is no longer viable for CPU miners. Someone has developed a GPU miner (assume it is not an exploit). One possible way to offer the diversity of miners is modifying the algorithm

While mining is against by some Bitshares guys/dev, I still believe mining is not only dilution, but a very effective promotion tool. Recently, a post on how to mine Steem is published on cryptomining

Finally, I know who is Satoshi ....