Hosting a website like AsoBrain Games requires a fair amount of money. At first we paid for this ourselves but when our member base started growing quickly we couldn't afford this any longer.
We want to keep our website free of charge to whomever wants to play. This is why we don't want to ask for an entrance fee.
We absolutely hate (annoying) flashing banners and/or pop-up windows. We like to keep the website simple and calm.
We really like the donation system because those who can afford donate and those who can't afford or don't want to don't have to.