So, for a long while we just had a single shared c5 demo setup that would clean itself out every hour on the hour. Crude, but an easy way to get a demo up. We started to really understand the downsides when we were seeing 900 new users in there at a time. Seeing things randomly change to Japanese under you is disconcerting as well.
Now when you want to play around with concrete5, you can easily get your own sandbox to play in. After 15 days you can even turn it into a paid hosting account.
Grab your own demo today!