Nothing has really changed minus the addition of things like RuneSpan, SoF and the FPS update.
In a nutshell:
Squeal of Forture, you're given a # of spins per day (usually 2) and from this you can win things like xp lamps, or "lucky items" which are a free versions of good items like a whip or ags, however its very rare.
RuneSpan is a runecrafting update that gives insane RC xp and is practically afkable.
FPS Update, they revamped the game to make it have less lag, there's probsbably been some "important" changes that I've missed but you can find them on the RS webpage.