It depends what game it is and how bad the bind is on the motherboard. Not every game uses the same pins some use more some use less. If the lip is on top of the motherboard it raises the cart slot up about half an inch in the middle so the pins on top might get a good connection but the ones on bottom and edges might not connect so well resulting in glitches or not working at all. So a game that only uses the pins in the middle might work fine and a game that uses pins on the edges might glitch out.
Also when this lip is on top of the motherboard it bows the motherboard as well and that can cause problems. This is how the lip should look from the bottom of the motherboard.