Comment Re:Don't keep old email. (Score 1) 228
Define "The Cloud". Who's to say your ISP doesn't store a copy of all emails received by you?
Same reason you don't save every piece of electronic crap your computer shits out on a daily basis.
Cost.
You're making the assumption it's costing them money and not turning them a profit.
For instance, Google uses your emails to make money. Read your eighteen-page legalese documents from your ISP lately? How about their "third party marketers" legalese? There has been a marked increase in companies aggregating such data in a way that "maintains privacy" but we all know how usually pans out, don't we? Also, you have no idea if the data is scrubbed of all personally identifiable information before it's stored in their database, or just before they sell it.
And even if you know your ISP isn't currently selling your info, there is no guarantee that they're not building a database of your emails so they can start doing it next year.