My comment to ats david address most of what you said, so I'm gonna paste it here
SFR should transition to upvoting posts through the Steem engine tokens... It's in process, and a year ago there was no decent SMT stand-in. Now there is.
If we want abuse to decrease, we need incentivize abuse fighting. Right now, the best to do that is upvotes (sadly, on automated comments).
I suggested that the ratio between the flag value and the SFR upvote should be significantly lower (in the 0.5-0.75 area), but I am in minority opinion. Although, at the moment, the goal is to actually popularize abuse fighting, so a 1:1 ratio has some benefits in the short term.
It will take some time to reach perfection. Please be patient
About the 'abuser' in question. Factually what happens is:
He sends about 75$ worth of coins to a bid bot
He receives 80$ worth of coins from the reward pool
People who post much higher quality content, get lower rewards because a large % of the reward pool goes to (with no means to offend what so ever) absolute crap
One of the key 'selling points' of STEEM, is, high quality content is produced & rewarded here. So users like him damage this moat in two ways:
1: a larger % of content is crap, and new users are not impressed with the platform, and leave
2: actual high quality content receives significantly less rewards, and thus is even less common on the blockchain
So he didn't really spent 80$ on the ecosystem, he just tried to convert 75$ to 80$, via a shady mechanism (people willing to upvote shitposts for STEEM). He made an investment.
Spending 80$ within the system would be something like paying a user coins for some kind of work, whether graphic design, video editing, or anything of value to the payer. Which extracting money from the reward pool: is not...