for no good reason
there is a good reason, they were lazy!
if you have checked their site in early days you could see that there has been nearly no change in their site. there were a lot of things missing, for example their API has been incomplete for ever and there is a text saying it will be added soon!!!
they never made any efforts to grow their business so they never could make any profit from it. as a result they had to shut down.
I definitely agree with you. They didn't seem to be so willing to renovate their website and be more helpful to people by doing that. If you really want to play big in this field, you should do better than that.