So DirectEdge submitted a proposal to start marking Retail orders as as Retail orders, which the SEC just approved:
http://www.sec.gov/rules/sro/edgx/2014/34-72292.pdf
From the proposal:
"Identifying additional orders as Retail Orders may encourage Members who wish to execute against Retail Orders to send additional Orders to the Exchange, thereby potentially increasing the level of competition around retail executions, resulting in better prices for retail investors."
In other words, retail investors are just bait!
http://www.sec.gov/rules/sro/edgx/2014/34-72292.pdf
From the proposal:
"Identifying additional orders as Retail Orders may encourage Members who wish to execute against Retail Orders to send additional Orders to the Exchange, thereby potentially increasing the level of competition around retail executions, resulting in better prices for retail investors."
In other words, retail investors are just bait!