Once in a while, I'll check my logs, and for the past few months, I've noticed someone using FeedDemon to monitor my blogs. Years ago, I blocked FeedDemon because FeedDemon checked my blog nearly every 30 minutes back then.
And now, the last release of FeedDemon, @ v4.5, is still checking my blog about every 30 minutes. Whoever you are, if there's an adjustable setting, please change it.
Otherwise, I'd be forced to block FeedDemon again.