In the table up top, I've shown the bonuses as excluding the $2,500 contingency, because that's what the rules allow. The reporting of bonuses is not consistent; sometimes a source reports the bonus as a round number ($2.5 million), but another source shows that bonus as $2,497,500. (Go to the top post, check out the mlb.com list of Phils draftees vs. the Baseball America list. They're both linked.) My table assumes that the Phils have taken advantage of the $2,500 contingency exclusion for all top ten draft bonuses (because it's stupid not to do this, and Dombrowski is not stupid, and he's clearly taken advantage of this most of the time).
So the $203,490 figure I cited above represents the max they "have available" to offer Spencer, because the contingency fee is baked in for all the top ten draftees.... But I think they could actually offer Spencer $203,490 plus a $2,500 contingency, or $205,990.
I don't think it's going to matter, though. Spencer has publicly indicated he's going to Texas, and not signing. I don't see $55,990 as changing that.