For me this site is opening fine... I don't use this service but the site looks working ok. If they stop working just use another brand that offer the same kind of service.
This is like FaucetBox, right? I don't know why to use this service if FaucetBox is very stable, works fine and is very popular (most faucets use it).
if you read the top it says
We are aware of that there is a huge delay since the last withdrawal. We are working on the solution now. Make sure you have access to the Bitcoin address you was using, the amount can be sent only to that address.
This free service will be closed after all the withdrawals processed.
what other micro wallet services are there?
You have faucetbox.com which is way better actually than microwallet. I have heard that it's going to shut down from about 4 months actually.