This is one hungry and growing fighter trying to make something out of an event whose hype is ending. He took the opportunity while it was still hot. Let us wait how this will be received by the Pacquiao camp.
A lot of things are going to happen now if Mayweather suddenly changes his mind and wants to fight Pacquiao, I'm pretty sure he'll go for a dream match than go for Spence, both fights are attractive but the Mayweather fights is something everybody wants, only Floyd is the one not wanting this to happen, next year will be excited for whoever Pacquiao will meet in the ring.
To be honest, I would rather see a Pacquiao-Spence match rather than a Pacquiao-Mayweather match. The latter is a Manny-Money match. LOL. What I actually mean to say is that it is just all about the money. There is even less entertainment in that fight. Their pretty faces will be untouched and the same before and after they make 12 boring rounds inside the ring. That would not even be a fight at all.
At least with a Pacquiao-Spence match, someone is obviously very hungry to prove something, and that is enough to make the older one among the two take it more seriously, and that would make the fight exciting.
I think spence has been calling for Manny before and after the fight that he recently won.
There are the two articles that I found.
https://www.boxingnewsandviews.com/2019/09/29/errol-spence-calls-out-manny-pacquiao/
https://www.boxingscene.com/spence-manny-pacquiao-fight-definitely-happens-2020--142842
In the 2nd article, it says that the fight between the 2 should happen in 2020, and if these two would agree, this would be good for the boxing.
I believe Spence is a real warrior compared to Mayweather as he knows how to respect and therefore deserve to be respected.
About money matter, I think it will be one of the biggest fight in boxing.