Let it go!
Keeping an IP budget afloat despite sunk costs.
The cost of securing IP can be heavily front loaded. Examples of such costs include patent drafting, pre-filing searches, filing fees, etc. These costs become “sunk” costs in that they cannot be recovered. Because IP protection can be a relatively long process, at any time during the process there are likely to be significant “prospective” costs: future costs that may be wholly or partially avoided depending on actions taken.