Useful Caribbean privateers could retain Crown support

Would the Crown keep funding Caribbean privateers if they remained useful against Spain and France?

Yes, as long as their attacks remained useful against Spain or France.

Continued Crown support depends on whether the privateers still damage Spanish or French interests. If they remain strategically useful, there is little reason to end the arrangement on a fixed date. No permanent privateering institution or funding system is defined. Support remains a practical wartime bargain that lasts only while it serves British policy.