The WBTS has always said the tithing arrangement died with the Mosaic law of the Jews.
Jesus came and taught priciples instead of rules.
The "widow's mite" story illustrates this. The lady gave all she had from the heart, which was supposed to be "more" than the others who gave from their surplus even though the amount was less.
The principle was of genuine generosity as opposed to giving out of obligation, formality, or show.
The WBTS has always condemned churches for all of their obligitory donation systems regardless of the name.
Calling it "tithing" on this forum is a mocking of the WBTS more than it is an attempt at precise terminology.
-TE