High tow vs. low tow for rough tows (long)

In article ,
"Janusz Kesik" wrote:

U¿ytkownik Janusz Kesik w wiadomo¶ci do
grup dyskusyjnych ...
Also gaining height (in order to shorten the tow)
by a towplane with glider behind is much, really much easier and less
stressing when using a short 20-30m rope.

I meant gaining height in a towplane with a glider behind, by using the
thermal to support the tug's climb rate.

If the combo has found a thermal, why wouldn't the glider just release
and save money?

Therre have been plenty of times that I've intended to tow to 2000 or
2500 ft but then released in a thermal at 1000 - 1500 ft.

-- Bruce