“LB: this is a stall tactic + she can get schar if he actually learns so even if this might not be the best way to get rid of him for good she might actually be mekariv him…(there is a chance however small it may be)(mitoch shelo lishmah ba lishma)”
No offense, but this is TERRIBLE advice! You are pretty much advising her to play with fire. Rebshidduch ignore this advise. Don’t worry about trying to mekariv him- mekariv yourself first. This plan is horrible and extremely risky. Just stay away from him.