blackmail for cheap design and "good review".
OP, this is exactly what you should not accept. a client who offers a pittance and expects gratitude because he chose you is never a good choice. have more respect for yourself than such offers give.

Fortune.st you are planning to turn the casino around with promotion through campaigns here, I already wrote that without a relevant budget you can hardly expect any kind of success. I don't know how serious you are when you expect a logo for $5.