So today my datacentre null routed one of my ips, saying it was having a DDOS. I never had a issue in the past with my site, so chances of ddos were bleak.

I start using my 2nd ip on different sub-domain to serve content & after a few hours, they again null route it.

Now i am sure, this isn't some DDos & i ask them, is this due to high traffic usage & they say, yes its because of it.

Then, i asked them if upgrade to a dedicated gbit; will resolve it. The answer was 'No'.

This provider, is offering lucrative bw deals; but seems they have run out of bw and started null routing high usage clients.

Can a provider nullroute just because they cant cope with high traffic ? or is it because its economically unviable for them and they start null routing.