500 is fair. 100$.. Come on, are you betting 0.01$ per bet... this stops a lot of the rain farmers from PH.
Yeah... assuming that you're just playing one of the originals, the most house edge that you're going to face is less than $15 in total losses (2.74% on Blue Samurai). If you wanted to minimize the cost of chatting you could even drop that down to less than $3 by playing Blackjack.
The total wager amounts, people overestimate them way too much.
You need to look the statistical loss by multiplying the house edge of your favored games with the requirements.
I think the people who are against this change are either spammers themselves and this could be the biggest portion, or people who are from third world countries.
You may say that you could potentially lose 3-20 dollars while getting there and that may not be a lot of money to you, and usually not a huge amount to other people as well, but to some people that is still a big amount, specially losing 20 bucks, but more importantly and the main reason, you could totally lose a lot more, you are not betting guaranteed, maybe you will bet a bit more riskier and lose a lot more, like 100-200 dollars until you reach 500, and that is like a salary in some nations. This is why I believe there is this situation where people from very very poor countries could have trouble reaching that 500 level.