Some disadvantages include high commission costs incurred by merchants sometimes. There have also been accounts of false and misleading types of advertising that has lead to unjust claims and also complaints from people. Merchants have been known to close down programs without informing the affiliates and not paying commission. Another major disadvantage is that pay can be quite sporadic. It cannot be relied upon as a stable source of income, especially if you are just starting out. It can also be somewhat unsecured. Link hijackers have been known to get paid instead of the merchant hacking into sites. It is worth doing a little research into the subject to find out the best programs available and to reduce the risk of not getting very far. It can be a long and complicated start but with a little perseverance and some luck, you can be a successful affiliate marketer.