When does Bytro run specific map events?

I've looked this up several times and nobody has even mentioned it in the forum or elsewhere. When does Bytro run map events? How do they decide which to run? I'm personally waiting for a 6x time event and I've been waiting for a week and a half and it doesn't come up. How often do individual ones get repeated, and how many do they cycle through before restarting? Or is it random?

Also, why is it that I can only access 6-10 games and then the list ends? Do Bytro's servers not support more maps at once? Also, are the events the same for all regions? The games I join are mostly spanish speaking (because I'm in Spain I suppose), are events in the UK region different?

Thanks!