What's the point in infinite dungeon?

Exactly as the title says. I’ve beaten the game and have every monster except a bunch of OMS, necrodrake, dreadwolf, tremorback, that tree thing, and nilomoth. I just don’t see the purpose in infinite dungeon without there being rewards… or is there?

You get golden eggs at certain checkpoints.

If anyone can tell me what the next checkpoint after floor 48, it would be much appreciated.

There are golden eggs every 9th floor and a musical score every tenth

So yes, there are rewards

The waypoints can be found here: http://www.hunterislandforum.com/index.php/topic/803-infinite-dungeon-waypoints/

And as one of the posts mentioned, the formula is n(n+2) for any additional waypoints.

I added that formula to my first post, for convenience.