^ Auction mechanism is already there and the system applies whether there are less transactions or not. The OP's point is letting you know which group is clogging the ethereum network causing fees to shoot up in recent months.
4. - Ponzi Schemes - Another of the big gas consumers, take a look at the picture from TOP-20 on 2 and 19 contracts. Projects like (Forsage.io and Lionsshare.io). In the first 2 weeks of August, Forsage.io has paid commissions over 5000 ETH. Despite the large amounts, the Ponzi still remains dangerous to participate.
Not only did they scam, they also help make other network users pay more gas
Meanwhile, eth miners are up 6x compared to btc miners.
#Ethereum miners made a total of $166 million from transaction fees in September – a new ATH.
That's an increase of 47% compared to the previous record high in August.
In comparison: #Bitcoin miners made $26M from fees – a difference of more than 6x!