My worst Skype annoyance was when they seized your purchased credits if your account was left unused for 180 days. As a sporadic user of Skype when I needed to place an international call etc, having purchased credits reset automatically was such a provocation [0]. Every time I have to re-install Skype for some reason, there's always a new regression or dark UX pattern in use. [0] https://blogs.wsj.com/digits/2010/01…
I had a similar experience: Microsoft deleted all my childhood email because I didn't log into hotmail frequently enough. This included the emails I sent to my first love. And the ones she sent me. All gone. Because Microsoft wanted to save some tiny amount of space. I love Microsoft and an writing this on a Surface device now but Christ, that was awful and would make me think twice about using Microsoft online servi…
When Gmail launched one of its main features was the amount of storage space - people were used to having maybe 10MB of mailbox space. Companies competed over that number. It reflects that email was never seen as being permanent, you were expected to clear old emails out, and many services automatically deleted old emails.