Be very careful when buying guaranteed traffic. I've investigated several of these schemes on behalf of clients. Most do not send any genuine traffic at all. They simply have a program on a server that requests web pages from your site through proxy servers, which makes it look like you are getting a lot of traffic, but you are not. One that I investigated didn't even use a proxy server, so all of the traffic was on a single IP address.
Some scams use iframes (with your web page in a minuscule iframe) set up on sites that do get traffic. That doesn't means that any of that traffic will actually visit your site, but you will not be able to tell the difference by viewing your sever logs. It still looks like each visitor is on your site.
There is a variation of the iframe scam where they use popunders on porn sites that pull in one of your web pages.
I don't believe that anyone can send 10,000 actual visitors to your site in a short time period. Before you spend money on guaranteed traffic, make sure that you understand exactly how it works.
"Democracy is two wolves and a lamb voting on what to have for lunch. Liberty is a well-armed lamb contesting the vote." -- Benjamin Franklin