@sarajw You're right about the effect of boosting, but please people, don't overuse it.
My main discovery strategy (algorithm, if you will) is following hashtags — that's where I find new people with shared interests.
If someone I'm following boosts too often (more than a few times/week), they're spamming my feed with stuff I didn't choose to see; either I'll block their boosts (which is too bad, because I'll miss the rare, exceptional stuff) or I'll unfollow them completely.
@david_megginson either it's the carousels on the Phanpy client, or I'm just following so many people now that even the heavy boosters don't overly flood my feed any more.
I do admit I rarely follow a person if all I can see in their profile is boosts.