That's aslo an interesting topic. Wheather to go 100% power up, or 50/50 on posts for then trading the SBD for STEEM in the market, which you would power up. I think going 100% PU would be similar to using the convert to STEEM, option in stead of trading on the open market.
Which one is more lucurative, may be affected by wheather the market trend is going up or down. Right now I only have speculations. Could be interesting to take a closer look at it one day.
RE: STEEM #1 Dilution of STEEM & How to Break Even