I've noticed recently that some really poor questions are being asked by users with usernames that consist of two lowercase characters followed by four digits. For example, here's one from user gc7283: current amplification and filtering circuit project proteus
A quick search for unique text reveals that this question comes almost verbatim from a question on Chegg, which is a well-known and much-despised for-profit homework/quiz cheating service: Question: A Remote Motor Speed Sensor Provides A Current Signal....
Is the default format for new usernames just two lowercase characters and four digits? Could it be that a bot is copying these questions from Chegg, or are we looking at a real person trying to make a quick buck by selling our answers?
EDIT: Here is an example of one of the "4-wire fan" questions: IS this the correct way to control the speed of a 4 wire CPU fan? This user just had one lowercase letter followed by four digits. I guess the MO has changed a little.