Sounds like a spam generator to me, too. Generally, this sort of scattershot approach isn't doing anyone any good. It clutters up the inboxes of the agents and costs the writer money that could be better spent on researching the right agent for a project.
I thought Miss Snark had addressed this basic issue, except for a site sending queries to fiction agents, rather than screenwriting agents, but I couldn't find it. The closest I came was an entry dealing with a site that would generate a "standard" query letter, which is a different issue, although it probably reflects an agent's reaction to this kind of scattershot approach to sending out queries without tailoring them to the recipient's preferences.
JD