At the moment you can by only one hundred of cloud credits. In Germany it costs 136Euros and expires one year after buying it. Think this is not correct and fair! If i buy something then it is mine. It is the same i go to the bank and get some money and the bank employees say's "hey after a year the notes have no value".
For a small shop that have not daily rendering's or simulations it would be welcome to have smaller amounts of cloud credit values. For example, the autodesk shop can offer beginning from 10 and end up in 1000 in an attractive price range, or the credits never expire.
So for a small shop like mine if i buy 100 cloud credits i can not use them all, and throw my money out of the window. That could be the reason why small shop's don't buying CC's!