It's fairly standard that maintenance times not be refunded unless they're extremely extended (24+ hours) for some reason.

What I do find a bit off-putting is the amount of maintenance, especially for problems that don't affect the VAST majority of players. I'd much rather those things be pushed into a regular, weekly or bi-weekly maintenance schedule than last minute "emergency maintenance". One instance is bugged so everything gets shut down for hours multiple times over... Why?