Depends on where you want to make the purchase from.
On the TrillerTV Website you will have the option to use your Credit Card, Debit Card or Pre-Paid card or use PayPal.
In the TrillerTV mobile app your purchase will go through iTunes, Google Play or Huawei depending on your platform.
In the TrillerTV ROKU Channel your purchase will go through the ROKU purchase interface.
In the TrillerTV Amazon App your purchase will go through the Amazon purchase interface.
Alternatively, you can use a coupon on the TrillerTV website.
If you are using Amazon Coins or any giftcards you might need to pay extra tax depending on the store you are purchasing from. Contact their respective support if you have trouble purchasing.