When it comes to cell phone marketing, especially for recruiting, you want to stay on your target's good side. A good way to do this is to let them come to you first. Use your open invitation to gain more information as a filter to eliminate all the uninterested candidates without drowning them in messages. Restraint is key and letting your candidates make the first move lets them be empowered by their decision to seek more information out on your company.
I will always endorse this approach over buying lists of numbers to randomly sending out messages. Yes this approach might yield some candidates but you also risk tarnishing the image of your company in the eyes of the demographics that don't care about the job and just had to fork over .25 cents to their cell phone carrier because they don't have texting on their plan. If their name gets on some list, those messages can begin to add up.
Thoughts? Comments? Let me know what you think and if you have ever been on the receiving end of unwanted cell phone marketing.