Putting the number of 'slots' available on the signup page is interesting. I wonder what the rationale for this is ... and it lets you infer what rate of signu

Putting the number of 'slots' available on the signup page is interesting. I wonder what the rationale for this is ... and it lets you infer what rate of signups they are getting (assuming it isn't just a marketing gimmick). The fact that premium is just twice the pro limits but costs slightly more than 2x premium stands out as a little odd. Why not offer incremental storage capacity in the same way as bandwidth?