I've friended 503 accounts, and 79 syndicated feeds. I've got 538 people who've friended me. No matter which way you take the "more than 500 Friends" comment, I qualify.
And I keep up by virtue of some of them being relatively inactive, and many of them being skimmable - picture posts, news posts, or simply updates of a kind I really don't care about from that person[1]. I'll generally get about 300 posts on a weekday, and that takes me maybe an hour to skim them all, open the ones that look interesting, and read them. I generally do this in my spare time over the course of the day.
And if I have more time, I read in more detail. When I have less time, I only pursue the really interesting ones in depth.
[1]: Personal updates from strangers who post nice pictures, MMORPG updates from people I read for humour posts, etc.
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And I keep up by virtue of some of them being relatively inactive, and many of them being skimmable - picture posts, news posts, or simply updates of a kind I really don't care about from that person[1]. I'll generally get about 300 posts on a weekday, and that takes me maybe an hour to skim them all, open the ones that look interesting, and read them. I generally do this in my spare time over the course of the day.
And if I have more time, I read in more detail. When I have less time, I only pursue the really interesting ones in depth.
[1]: Personal updates from strangers who post nice pictures, MMORPG updates from people I read for humour posts, etc.