If you're sending SBD or STEEM, then it is investing - delegating STEEM POWER is something else :)
Now, 1 SBD will be converted to around 0.71 STEEM POWER which should bring around 0.0006 SBD daily profit (so payout every second day, once the profit sums up to at least 0.001 SBD).
In another example 10 SBD would be converted to 7.1 STEEM POWER and this would give around 0.006 SBD daily profit.
The profit directly depends on STEEM price, once the STEEM goes up in value again, the profit will be also increased :) @tipu status!