Right now, the steem dollar is priced so high ($1.73 on coinmarketcap) that 100% power-up posts are not recommended. More here, but in short you can either do a 50/50 post, then trade the SBD portion of your payout to steem on the internal market (don't use the 7-day conversion mechanism). From there, you can power -up, or wait for the pegging mechanism to catch up and bring down the cost of SBD, at which point you can buy SBD back at a profit.
If those trending posters dump the liquid halves of their posts on the market, that will also help bring down the cost of SBD, so I don't think it should be an issue for the platform.