The gambling apps churna lot of money through them fast so all they ever really have to do is just not payout for a few hours and then.... leave.

On a side note: it makes me wonder if there should be some regulation for making projects.
And it all becomes even riskier if the owner of a dapp cannot be held accountable in any way.

It won't work until people choose not to use applications unless they know the owners and can hold them accountable. @aggroed and @yabapmatt couldn't pull this shit for example because, they are known.