Credit packages allow you to download as many images as you want or need with no significant time limitations. The majority of our credit packages offer substantial bonuses and discounts. Furthermore, credit packages allow you to purchase images under the Royalty free license or under Extended Licenses. You have to use credits in maximum 12 months from their purchase date, but licenses for your downloads are lifetime. Subscriptions on the other hand, are based on a certain number of downloads allowed on a daily basis, up to 25 or 50 images, depending on the selected plan. Although there is a daily limit, you can download any image or size. Considering the high mount of images that you can download, the daily restriction is applied in order to assure an equal split of the consumption throughout the whole subscription period. Please note that subscription packages allow you to purchase images only under the standard Royalty Free license and that a level based system is in place. For more details see pricing table here
.Subscriptions are usually required by companies demanding high volume of images daily, while credits provide more flexibility and cover extra usage.