IMO Oxwall (or any social script) is not designed to run on a limited inode structure only because you need some flexibility for the script to run and do what it needs to do. And also to allow for growth. Running any social script on a limited inode structure is much like expecting to raise rabbits in your bathroom (we all know how fast rabbits multiply).
I cannot speak for your cron command files but i will say that IMO you really should be looking for a new host rather than trying to manipulate your script to fall within limits of a host which limits inodes in the first place.
Limiting inodes is a way for hosting companies to tackle the old "unlimited" issue and to be able to add some limits. I don't agree with it personally, i think it is pathetic when they do that.