As far as I understood, the load is weak. After all, we are talking about sending a signal to the ADC.

 

Unfortunately this is a common occurrence.

A TS makes a post with either flawed concepts or serious circuit errors, which causes the old farts here ( myself included) to become agitated.
When the OFs request clarification, or point out the errors, the TS vanishes into thin air.

It makes for interesting reading, though.