Unlimited downloads
While not a common feature, some sites offer subscriptions that allow unlimited downloads. This is great if you need a large amount of content. We have benefited from companies that offer this feature. Care does need to be taken as there can be some restrictions in the licencing terms to ensure that this feature isn't abused. For example, Envato Elements requires you to use the asset while you have an active subscription. This means you can't download lots of stock photos or videos, end your subscription only to expect to use those images in projects in the future.
Sites with this feature
Pexels
A popular platform that offers a vast collection of high-quality, free stock photos and videos. The design platform Canva acquired Pexels in 2018.