Final answer:
The sampling method appears to be flawed as it may exclude certain demographics or individuals who do not use the internet or did not see the question on USA Today.
Step-by-step explanation:
The sampling method described in the question appears to be a somewhat flawed sampling method. The survey only includes Internet users who responded to a question posted on the electronic edition of USA Today. This means that the sample is not representative of the entire population of people who use Wi-Fi hotspots. It may exclude certain demographics or individuals who do not use the internet or did not see the question on USA Today.