Is it wrong to encourage conversions to Islam by giving monetary or materialistic benefits as a symbol of support , help and brotherhood ?

Also, There is a verse in the Quran that defines people who are eligible to receive charity money (Zakat). Among them are people who newly embrace Islam so is this encouraged?

Al-Mu'allafatu Qulubuhum are leading tribal figures of influence on their people, and giving them Zakah is hoped to incline them to convert to Islam.

Apart from Zakat, Are there any examples from the Prophet's pbuh history wherein he gave gifts or other benefits,emoluments etc to encourage conversion to Islam?