Why would Perseus, with more than 5m oz (and rising)invest in...

Why would Perseus, with more than 5m oz (and rising)invest in this little hopeful unless they knew it was a great thing? That's why I bought Burey, and I'll buy more if anyone is so silly as to dump them on a bad day.... good luck shareholders, maybe it's a mini-Perseus! And yes, why did they dig deeper than planned, and isn't this a bit of a cryptic clue: they ran out of pipe while drilling. Was it that good?!?!? Cheers...