After Mr Brown's 2010 financial returns showed he accepted a contribution of $15,000 from SkyCity, he came under fire from the lobby group Gambling Watch and Maori public health agency Hapai Te Hauora Tapui.
That was followed last year by criticism from his home community of Otara, Labour and Green MPs for "sitting on the fence" and not doing enough over the pokies for convention centre deal.
This week, Mr Brown continued to extol the "huge economic" benefits, particularly to unemployed youth at "my community in the south" who would get jobs at the new centre.
SkyCity gave Mr Brown and former Auckland City Mayor John Banks $15,000 each at the first Super City mayoral election. At the time, SkyCity general counsel Peter Treacy said the company made the donations "to facilitate the democratic process".
Corporate communications general manager Gordon Jon Thompson yesterday said SkyCity decided some time ago not to make donations to Auckland mayoral candidates for this year's elections but did not say why.
Meanwhile, changes to the local electoral finance laws that allowed Mr Brown to use a trust to hide $499,000 of anonymous donations at the 2010 election, are due to become law in May in time for the October 12 poll.
The Local Electoral Act is being amended so candidates must disclose all donations of more than $1500 - the same as for general elections.
Mr Brown's electoral return for 2010 showed he spent $581,900, of which $499,00 was folded into a single trust.