When I bid 5.00sbd I get a vote valued at $5.26 USD. Which considering the cost of SBD right now, is pretty good. Plus they vote AS soon as you bid. No waiting. Some people get noticably larger ROI. I think it may depend on how long you've been white listed or maybe it's because the others are delegating to minnowbooster. I'm really not sure. I've seen people who bid 5sbd and gat upvotes of 6 to 7 usd. But...you will NEVER get negative ROI... let alone -30. ☺️