I have rcd this spam text from three different originating numbers from different states over a three day period, but the same web address.  Probably a combination of random number generation + text message from an email application (this is free to the sender!) + number spoofing.   I have sent complaint simultaneously to FTC/FCC, State Attorney General as well as my local large market newspaper consumer editor.  I'm in Ohio where Payday loans are illegal and these are attempts to circumvent the law.