Guaranteed Delivery
Product: Video chat, sexting, custom videos, etc.
Small independent cam sites will give you full support in case you buy a session or custom work and it's not delivered. They work with a very small community of trustable sellers and they all know each other.
I can tell you for a fact that sites such as CamModelDirectory, LiveCamModelShow and GirlsPrivateCam will intervene in favor of the client in case of problems. Models don't want to mess up their relationship with the sites because that's where they take their livelihoods, they don't want to risk being banned.
Prepaid sessions give you the biggest freedom to chose which app you want to connect (although the most popular is Skype, many people prefer to use Discord, Snapchat, Telegram and even WhatsApp), the moment you want to do your session and it's easier for the model to plan ahead when they know how long you'll have together.
Favorite Sites: CamModelDirectory, LiveCamModelShow and GirlsPrivateCam
Escrow
Product: Custom Video
I find it very useful and safe to order custom videos through escrow because that's the kind of work you don't receive instantly after payment, especially if you have never worked with that model before.
This is how the escrow system works: you pay for the site upfront but the model only receives the money at the delivery date. If she fails to finish the job, you get a refund automatically.
Models have a different turnaround time (for example, I usually have it done in up to 72 hours), so the delivery date is something to negotiate individually, but keep in mind that the standard limit for custom videos on the escrow system is 30 days.
Favorite sites: ManyVids, IWantClips and ExtraLunchMoney
Pay per Minute
Product: Video chat and Phone Sex
For video calls on Skype and phone sex, one way to do it is through Pay Per Minute.
You'll top up your account on the site and then call the model on skype, your session will be as long as you stay connected or until your money runs off. Note that they only charge you for the money you have already deposited on the site, so you have total control over how much you spend, not like the old days where you could call phone sex and then get billed later on your phone bill.
Favorite Sites: NiteFlirt and Skyprivate
Pre Made Videos
Product: Videos and Pictures
You want to watch homemade amateur porn, you can use clip sites and fan clubs. Many sites give a preview to every video and describe the quality resolution of the video and the length.
If you want to download the video, make sure to check if the site will allow you to and if it's available for the video you want. Sites like OnlyFans and other fan clubs rarely allow the download.
Clip sites will show on each video if it's downloadable or streaming only.
The positive part of streaming videos is that you don't need to keep it on your device, you just need to log in and it will be available. Good for privacy, to save memory space and no risk to lose it, the videos are available any time anywhere you are.
Favorite Sites: Clips4Sale, ManyVids and OnlyFans