I opened a ticket in Cryptopia about the maintenance in the SIGT wallet and they said that they don't have an ETA 'as the investigation is still underway'. So kinda of 'We see that it is offline but we have nothing to say to you about the problem itself'. Or 'Who cares, just wait'. Or 'Even that the Market Page doesn't say that there is a problem, there is, but we don't care anyway'. Or 'You shouldn't wait on this, because I have no clue about what really is going on'.
No ETA is like 'Ok, I'm lost here... so give me an unspecified amount of time and then maybe I can figure out'.