This is not a good omen, because a well structure and business activities website cannot closed down for days because people will loss funds and also the company itself will loss funds plus customers. So for a mixing company to close the site down because of website maintenance is not a good thing at all. And if they want to go into a long time maintenance then they have to give pre-information so that those who have business with them will know what to do and not this sudden maintenance for days.
They can do the maintenance work while the site is still active or shot it down for few minutes or second then bring it back to alive then the high tension of the clients and customers will be douse. Well everyone has they way of planning their businesses.
If there were people who lost funds, you would have seen some claims in the reputation thread by now, but at the moment there is nothing that says this move was well planned for to avoid holding any client's funds!
Btw, this website maintenance isn't something that happens on a regular basis so for them to go their route is a cost they will have to take as the benefits might outweigh the lost revenue...its part of business, Looking forward to a to a bigger, better Sinbad
