Thoughts on placing amps on stone/tile base

Dear all,
It appears that all the equipment in my component rack is generating a lot of heat to the point where I am concerned about fire and/or component damage. I need to move my amp out of the rack to get an immediate improvement and wanted to check with you folks on whether there are any pros/cons on placing the amp on a large spare tile that I have available. I have seen some platforms made by Butcher Block Acoustics and Mapleshade but didn't want to jump in and spend money prior to understanding whether there was any benefit other than aesthetics. The amp is going to be hidden behind my speakers anyway so visually there's no possibility of seeing the platform or the tile.