I complained /ranted at a Vx survey last year, and about a month ago I got an email of a team that Vx has employed to snoop on customer service, they are willing to pay iirc £100, if I take part. I need to contact them before my next service (in about a month), then they will come in with me as I drop it off and pick it up. Taking notes in secret. For a hundred quid, I’m in.
I wouldn’t touch that with somebody elses barge pole. I bet there is some iffy conditions to agree to before you see the colour of their money.