Oh yeah 2.9% + 30c can really add up! Yikes!
The issue with crypto as a currency is that the price fluctuates and in the long term STEEM will continue to fluctuate, while the SBD is said to get pegged to the dollar. For this reason, we're pushing for consistency with SBD on TheShop.
Hope you still make a ton of sales though! :)
- @robchen