I would love to see different slot machines other than the standard ones we have right now, and a multi-line slot machine would definitely be awesome addition to the site. With that being said here is the general idea of a multi-line slot machine.
1,000 sP Wager 1 Line - Jackpot 5 Million sP 2,500 sP Wager 2 Lines Jackpot 10 Million sP 5,000 sP Wager 3 Lines - Jackpot 20 Million sP 10,000 sP Wager 4 Lines - Jackpot 30 Million sP 15,000 sP Wager 5 Lines - Jackpot 40 Millions sP 25,000 sP Wager 6 Lines - Jackpot 50 Million sP 50,000 sP Wager 7 Lines - Can Win Progressive iP Jackpot! - Progressive Jackpot starts at 100,000,000 Million sP and grows per wager 75,000 sP Wager 8 Lines - Can Win Progressive iP Jackpot! Jackpot x 2! - Progressive Jackpot starts at 100,000,000 Million sP and grows per wager 100,000 sP Wager 9 Lines - Can Win Progressive iP Jackpot! Jackpot x 3! - Progressive Jackpot starts at 100,000,000 Million sP and grows per wager
3 Matches - 3x the wager
4 Matches - 4x the wager
5 Matches - 5x the wager
3 Matches - 15x the wager
4 Matches - 20x the wager
5 Matches - 25x the wager
3 Matches - 20x the wager
4 Matches - 25x the wager
5 Matches - 30x the wager
3 Matches - 25x the wager
4 Matches - 30x the wager
5- Matches - 35x the wager
3 Matches - 35x the wager
4 Matches - 35x the wager
5 Matches 40x the wager
3 Matches -35x the wager
4 Matches - 40x the wager
5 Matches - 45x the wager
3 Matches - 40x the wager
4 Matches - 45x the wager
5 Matches - 50x the wager
1 Match - 60x the wager
2 Matches - 75x the wager
3 Matches - 90x the wager
4 Matches - 100x the wager
5 Matches - Jackpot!
Of course there needs to be other filler types of prizes, which could include Battle Exp, Items, bonus rounds, bonus spins etc Just a basic example of how and what a multi-line slot machine could look like.

I feel like the slots page should be revamped, whenever I have to do it for Drills, I get so annoyed with having to scroll down and being unable to refresh instead that I actually zoom out of the page, yet the spin again button keeps moving even when I haven't won anything so I can't just keep clicking, I still have to move to the button.
Maybe it could be made to work like the vending machines? I don't know how easy or hard that would be to do, though. Just to save on loading pages, and to save on scrolling too. Oh, and one time while playing I got the "Too many items in your inventory" which doesn't happen with vending or the Mystery Box, so why would it happen with this? Anyway, I had to go out of the game and back in instead of going back because of the "Do not refresh the page" thing. If there was a way to remove any of that, I'd be thankful.