These are all just shady marketing techniques. The names/addresses/birthdays are culled from other mailing lists that you are on, where you've neglected to "opt out" of sharing your information with Company X's partners. Company X then sells your basic info to whatever clearinghouse these guys use, and you start getting the junk mail. They also can find this info on the public records rolls like for property sales (ever wonder how you start getting the Home Depot catalogs right after you buy a house?). They can't legally use the exact US logo (or any other company) so they just get as close as they can, in hopes that an unsophisticated reader will fall for their bait. 9 times out of 10 they are selling extremely overpriced timeshares. Your "free trip" may actually even be a trip out to hear their pitch. Throw them away
