But how does this apply to not risking more than 10% of your Bankroll? I play 10NL, and I only recently got my BR over $400, so now I've started 4-tabling, up from 3.
I don't think you should count multiple tables for that rule
someone with $750 could definitely 20 table NL25, even though they'll have more than half of their BR on the tables they're still doing fine