There are certain 'Hot' 4d numbers which cannot be bought in Magnum, Damacai and TOTO. This happens sometimes when there are too much being placed on a 4d number (for instance: 1111, 2929), when that happens, the player will not be able to buy that 4d number at all, and would be informed by the counter staff that the 4d number is not playable anymore. Therefore it is always a good practice to buy earlier in all TOTO, Magnum and Damacai.

Apart from Magnum 4D, both Da Ma Cai and Toto Sports offers other games, for instance Sports Toto offers 6D Jackpot (which is almost the same concept but uses 6 digits instead of 4, hence higher winnings). Da Ma Cai offers a 3D and 1+3D which could be alternatives to the more common Magnum and TOTO 4D games.