I don't really understand Portuguese, but hope this what you asked.
Ineffectiveness: Many people have false hope, causes addiction to gambling so people never gain wealth but instead develop a habit of wasting money
Effectiveness of informal trading: more freedom for trading money for goods because seller can negotiate as they want , an informal trader doesn't have to provide for any employees in drastic lengths, informal traders can relocate easily because they dont do business in government owned buildings
Ineffectiveness: informal traders can change prices whenever and all the time as they need it, informal traders can often lie or deceive more conveniently For their business.
Hope i helped. Peace
