One funny thing you need to know about freelancing site is that they earn from advertisers so how much do you think they are earning which will make them to run a bonuses?that may affect their business this guys are up for business and every business need to be properly manage,so dont just expect that except you are luckyFreelance sites are all about connecting people who want to sell services to people who can be able to buy them. I do not see any reason why they should be giving unnecessary bonuses but show from time to time they usually run some promos.