This reminds me of when I had a player take the keen mind feat and it was an absolute God-send for drip feeding lore. "Kat, you've seen this shape before, the bartender had a symbol like this on their ring"
I had to drop in a few irrelevant observations to balance it out, but it was great.
Contact Other Plane is also one of my favourite spells a player could take at my table. It makes them get lore questions answered for practically nothing.
I even turned the spell into a small sidequest where he goes to the same entity everytime, trades memories to it in exchange for it digging informations better than what the spell normally provides.
It's why it's better to say Yes and rather than No