I have not yet had the experience of a scale back of a SPP based...

I have not yet had the experience of a scale back of a SPP based on the applicants existing holding.

My usual experience is along the lines of a formula that has no regard for the size of the existing shareholding, for example:
- a minimum grant - say $2,000 worth of shares
- a maximum grant - say $9,000 worth of shares
- with a percentage scale back in between (say 60%), based on the amount applied for.