I don't do this for rewards. I will get same amount (or less) of money back.
I also don't expect to be in first 100 witnesses. I will run my witness server even when I will lost all money every month. I get enough money from delegations to cover server costs.
I also don't want to hide anything, because everyone can see transfers in my wallet.

For promotion I spend:

• 11.061 SBD to minnowbooster
• 14.000 SBD to ipromote
• 5.000 SBD to aksdwi
• 40.000 SBD to upmyvote
• 50.000 SBD to appreciator
• 15.000 SBD to sneaky-ninja
• 10.000 SBD to pushup
• 30.000 SBD to boomerang
• 25.000 SBD to postpromoter
• 40.000 SBD to jerrybanfield
• 100.000 SBD to upme
• 15.000 SBD to booster
• 50.000 SBD to buildawhale
• 1.000 SBD to smartmarket
• 75 BEYONDBIT (Worth ~35 SBD)

• Together: 406.061 SBD (+35 SBD = 441.061 SBD)