Love the phone shops. You make precious little money but I'm surprised how quickly I can plow through 5 or 6 in a day...I'm often done by 3PM. My "goal" is to make money every day. Either at my "real job", mystery shopping, merchandising, free lancing, or Uber/Lyfting. Its not big money on the phone shops but I'll take it; especially relative to the amount of work I perform.
As for whom to contact....IPSOS, RBG, Intellishop has some now and then. BARE has some too I think.