The XP earned for several actions seems to have been dropped; is this a bug, or a stealth change from They Break Games to encourage more people to purchase boosts/premium accounts?
Score is now your base unmodified points for each action. XP boosts, total income and certs are unchanged. Here's a reddit thread that mentions it. It was a long standing issue that score was inflated by XP boosts when they were meant to be different concepts - otherwise they'd have just stuck with one name. It's causing a bit of confusion as people are used to them being synonymous.