Using Meet for a large-scale online event?

Hello there and apologies if a similar question has been asked before: I’m working on an online event with a major German newspaper, facilitating 1on1 online meetings. Sometime in May around 15-20k people meet digitally and I was wondering whether we can use the hosted Jitsi Meet service for that, simply generating 7.5-10k rooms via random URL strings. Other services like WhereBy charge top dollars for that, so I was a bit confused to find that Meet is completely free.

Are uses like this one discouraged?
Can we pay you?
Would a spike of 10k meetings (=20k participants) at roughly the same time cause any troubles for your infrastructure?

Best regards,
Harry