The Argentine forward attracted interest from the Brazilians after hitting the ground running in the Premier Soccer League (PSL) having joined Usuthu on a free transfer.
Tade, 30, had parted ways with New Zealand football powerhouse Auckland City and the KwaZulu-Natal giants snapped him up ahead of the current season.
The Santiago del Estero-born player was quick to establish himself as one of the most lethal strikers in the country - scoring seven goals in all competitions.
His exploits did not go unnoticed as Tade was linked with PSL giants Sundowns and Orlando Pirates ahead of the current transfer window.
The Brazilians have since announced the signing of the former Team Wellington forward, who won the New Zealand Football Championship with Auckland.
The deal between the two PSL clubs also sees Bonginkosi Ntuli move in the other direction on a permanent deal having initially joined AmaZulu on loan from Sundowns at the beginning of the current campaign.
Sundowns and AmaZulu made announcements regarding their latest movements on their official Twitter pages on Wednesday.
Lunga Sokhela, AmaZulu GM— AmaZulu FC (@AmaZuluFootball) January 30, 2019
“We are delighted to land, Bongi’s signature on a permanent basis. His work ethic speaks for itself, he understands the culture of the club and is well loved by the Usuthu fans.”#Usuthu_Unite pic.twitter.com/tfakA3VZ0V