I substitute a different one that, if one were to be uncharitable in a particular direction, could appear on your list:
I don't trust freemium services like this with important things.
If I'm trusting my private data to a company to store, or anything else equally important, I have no problem paying for it, and I don't want to share the service with a trillion and one freeloaders on the Internet that are going to divert my subscription fees away from... well, making sure stuff like this doesn't make it into production. Something like Carbonite or Mobile Me (I know, put the pitchforks down) depends on its paying customers to stay and keep paying. Freemium depends on enticing its free customers into becoming paying customers. These are different priorities.
I do have to admit that I have a LastPass account, but I do pay for the premium subscription, and I only signed up after doing a bunch of research; I'm confident that they've done things right as much as possible. With LastPass, I'm the weakest point in the chain (social engineering, weak master passwords, and physical access to local machines are the easy targets over trying to brute force the encrypted blob LP's servers receive when my vault syncs).
Disclaimer: I have no affiliation with Carbonite, Apple, or LastPass, okay?