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Buying the space in dropbox has to be for lifetime by one time payment. I hope drop box developers will come up with plans of buying drop box space for lifetime by keeping fixed amount Starting fro...
Mostly, researchers get huge contingencies but are limited to one, two, or a few years. So it is easy for them to buy a permanent plan at that time period. But if you buy on a subscription basis, once the project is over, it is difficult to pay the subscription price. Ultimately you would have to collect the data in offline drives and close the subscription. So, I think it is beneficial for the company also to provide life lifetime plan. Definitely, it will be more costly than the usual subscription basis.