Dear Ahmad,
As salaam alaikum,
I hope you won't mind if I share my understanding on this subject knowing that it is meant for Br. Joseph.
Regarding your question, what I understand from Br. Joseph’s sentiments, in such a scenario, as Br. Joseph has put it above, the charities are meant for the Prophet “in the same spirit as we note in verse 58:12 where private consultations with the prophet (that went beyond general preaching) were twinned with a genuine/kind gesture of some sort of charity, if possible. This was considered the better approach.”
Given some other contexts, as like that of 9:103, it can be argued that those charities might not only have been those twinned with some ‘kind gestures’ of some sort of appreciation for the Prophet’s (pbuh) private advice/consultation but possibly also meant to be distributed to the deserved categories (9:60).
From my humble perspective, I see 58:8 depicting the nature of ill private conversations (najwa) as those conspired for sin, aggression and defiance against the Prophet Muhammad (pbuh). Such consultative conspiracies are referred to as Satan’s handiwork in 58:10 and could be contagious amongst the believers (4:113) as seen in 58:14, 19. Believers are thus advised to refrain from such secret conversations (idha tanajaitum) and rather do it in virtue and piety (58:9). Verse 4:114 mentions about the lack of goodness (khaira) in many of private conversations (najwahum) except those ones in which is enjoyed charity (bi swadaqat), kindness, or those for reconciliation. Thus, ‘goodness’ (khair) - 2:271 is achieved as well as purity (tuthwahiruhum) and sanctity (tuzakihim) through the paying of charity (swadaqah) - 9:103.
Charity before the private consultation with the Prophet (pbuh), done seeking God’s approval (i.e in the spirit of ‘fi sabilillah’ - 9:60), could thus purify believers, possibly also from Satan’s whispers avoiding sin, aggression and defiance (58:9). On the other hand, 58:13 reprieves those who are not able to offer charity before such private consultations (najwakum) to just establish Swalat, give Zakat, and Obey Allah & the Prophet, given that God has pardoned them.
As regards not asking of a pay/fee for the Prophetic/religious preaching, this was in fact instructed of the Prophet (pbuh) by God as even of a proclamation (42:23).
“It is that of which Allah gives good tidings to His servants who believe and do righteous deeds. Say, [O Muhammad], "I do not ask you for this message any payment [but] only good will through kinship." And whoever commits a good deed - We will increase for him good therein. Indeed, Allah is Forgiving and Appreciative.” (Qur’an, Ash-Shura 42:23)
Hopefully that somehow helps in sha Allah.
Regards,
Athman.