Great download speed, near zero upload speed. - Time Warner Internet

This question is about "Great download speed, near zero upload speed.", with Time Warner Cable internet and apps. Suddenly, out of the blue, my upload speeds have dropped to near zero; 0.2 to at most 0.8Mbps. I had a technician out this morning who checked the lines at the street and house and said everything looks fine. Of course, my speedtest results were great while he was here, first time in days. I had previously had a technician install an amp on my line due to a power issue we were having about a year ago, everything has worked fine since then until now. Today's tech bypassed the amp, claming that I was getting sufficient power levels without it. Then this evening, I am back to near zero upload speeds.

Any ideas?

Great download speed, near zero upload speed.?