There are more than 50 million people older than 18 years living in Thailand. A poll of only 1310 of those people being asked loaded questions is absolutely unrepresentative of the true support or lack of support for this project.
As an observation wifeys sister is a right wing monarchist, can't say any more than that. She belongs to a group, some would call it a cult, vehemently opposed to Taksin and this casino project but come the 1st and 16th of every month they are all buying their lottery tickets and playing the local mafia run lotto.
Ask the 'right' question in any poll and you can get any result you want.