^ Yup. I had like 60% of my trading stuff over there back in the day and the rest at Bittrex and BTCe. No KYC, annoying the mods in the troll box, overall high volume across the board for the more popular altcoins.
And I remember there were pairs that had XMR as the base currency. The original owner prolly is waaay ahead of his time.

Yes, Polo was cool back in the day - and Monero was a part of its success. Like others, I moved there as soon as Monero was listed - just to actually be able to buy some.
Running XMR pairs was about the exchange's fondness for the coin, I assume.
Of course Tristan d'Agosta sold up in the end and it's never really been the same since. It was a bit iffy and chaotic, but it was cool. It was one of the big exchanges at one point. I still have a kind of loyalty to it, probably irrationally nostalgic - but lately I have reluctantly moved half my alt trading off it in favour of Finex.
Now Polo's moving as fast as it can into Defi stuff (driven in part by investor Justin Sun of course) but I am a bit too old school for Defi.
I still can't resist trading some alts, though. That said - all alts except Monero are just for stacking a little BTC. If I trade Monero, it's to get more Monero. It's just too good to let go of and certainly underpriced.