The post says they're "participating in Quora's most recent investment round". The normal meaning of that would be that they're buying at the same price/valuati

The post says they're "participating in Quora's most recent investment round". The normal meaning of that would be that they're buying at the same price/valuation as that Series C round, so if it's anything like YC's usual size of investment it would be a very small stake. (Ex-Quora employee, but I have no inside information.)