I don't see why people won't buy it. Do you know the scale of a 250GBPS DDOS attack?
I believe a good DDoS attack is about elegance, not scale. Anyone can spam a bunch of requests but any security expert worth his/her salt will be able to recognize a pattern in the attacks and block it in about an hour or so.
But I'm not an IT expert either so take my opinion with a grain of salt too.
considering he's given bandwidth, it's most likely he's just talking about packet flooding as opposed to a specific protocol exploit - in which case yeah, it's pretty much just raw scale. 250GBPS (B!) let along the 2TBPS claimed is going to punch the fuck out of just about any hardware device put in place to filter it, so while the target server itself isn't getting hit, the route to it is broken. your average 1/10Gbps enterprise switch isn't going to have a backplane anywhere near that size, let alone smaller websites and service providers' internet-facing ports.
hahahahahha
What?
anything I ask about it you'll either not answer (if you do have access to it) or make up (if you don't), so I'm just going to say I find it very unlikely that you do, in fact have access to ~2TBPS you can throw around, especially without a botnet.