Sparkles review
Sparkles uses a balance called Sparks for messages, photos and other interactions. The public store explains how you can earn Sparks or buy more when the balance runs low.
Earning Sparks while you use the site
The store says you can still browse and read past chats with an empty balance. Sending new messages needs more Sparks. The quests page describes daily rewards and growth tasks, with larger rewards on Premium. The terms also describe one-time purchases and recurring plans.
A starter balance or ongoing rewards
Fuckd AI gives new accounts 25 Spunk to allocate between messages and media. Sparkles offers a different reason to return by tying some of its credit earnings to ongoing activity. If you only want a first evening of chat, a defined starter balance is easier to plan around than rewards you will earn later.
Anabel’s take
I'd choose Sparkles if I wanted to dip in for short sessions and collect rewards along the way. For a long scene in one sitting I'd want to budget the whole run of messages before I began.