you may want to look up some of the projects in the different gardens in that forum section. I think the results will be different in the varied machines. In the smaller machines I let it go for about 2 harvests, BUT..that is not to say you won;t be tempted to snack as you walk by.
My Dad used to grow toms and then complain that there were not very many growing..he used to pick them off and cram them in to munch on every time he passed by the red ones! LOL
Indeterminate does eventually come to an end.Some let the plants stay in the machine and 'squeeze' the last few toms from the plants for months and the plants look hideous. If you care for the plants and harvest rather than snack ,and trim off the dead leaves every once in a while I would guesstimate 3 harvests which is what I got in a Harvest and a SS6. JMO