Known paylines, unknown outcomes in Big Bass Splash
10 fixed paylines on a 5x3 grid say nothing about when Free Spins will start. How often Free Spins come is not known in advance, and the RTP does not tell you when they land. The result of one session is random, so the RTP describes the average over a very long run, not the night you play.
Three rows per reel tell you nothing about the RTP. The RTP version running in this game is shown only in the game rules, and a title with a similar name can run another one. Read the rules for the exact title before you open it, not the name on the lobby tile.
x5,000 the bet caps Big Bass Splash, and very few sessions come near it. Hitting the cap depends on luck, and nothing on the screen tells you when the rounds that pay it will come. Treat the maximum win as a limit on the game, not a forecast of your result.