The blockchain explorer that shows the picture shows the reward in USD, not in SBD.
Therefore, it is clear that the loss is bigger than 10% since I bid with 0.99SBD which was over 1 USD.

Also, my intention was to bid 0.099, but I either erred, or it was something worse in the middle, since it happened to me with other bots too.
One of their owners partially refunded me for it, the other did not.