Can any session of Retro Sweets be predicted?
Wild Candy Symbols can land on any base spin, and nobody can tell in advance when a bonus round will start. The result of one session is random, whatever the RTP. A long run without a bonus says nothing about the next spin, and a quick bonus says nothing about the session that follows.
Each spin on the reels returns money at the RTP version that is running, and that version is shown only in the game rules. Check the rules before you play, since the same title can run at different RTP figures.
Spins on the reels can reach the win cap, a fixed multiple of the Base Bet, but that ceiling is reached very rarely. The cap limits what a spin can pay, and it promises no payout at all.