At this moment in time I think it does not make any sense or difference to be on an exchange. more than 95% of all scryptcoins is currently simply not profitable, you will spend more in electricity than what you might get in return, most of this is a result of major issues with a lot of exchange sites and market losses. The best thing to do now is to save up what you have and if you can afford it just mine some more. Voting or bribe systems on an exchange site are pure stupidity in my opinion, if I would be running an exchange site and want to actually make money by charging a fee I would want to include as many coins as possible and not limit my site to a few coins and as a result limit my potential profit
well the thing is with the bribes, they make way more money off the bribes than they do the transaction fees/trade fees... look at some of the ones crytpsy has added... i've seen bribes as high as 10btc in order for them to get that in trades they would have to have a trade volume of 5000btc... way easier for them to just get bribes ;P
at the moment those sites are simply making way more by just being bribed i know i wont pay a bribe... if other people want to support that kind of shadiness they can, but thats not 'my thing'
as far as cryptorush goes the support has been notified the other day that kgw was fixed so its juts a matter of whenever they fix it...