I have a friend doing this, and his experience is that it works, but expect it to take much longer. From TR finished to start flying it took 6 months from arriving in Jakarta, and even with a new TR it was not a walk in the park.
Ruining T & C's, can't see that in these cases, as not many would go to fly there anyway, most the companies with these schemes would be pretty unattractive for people from Europe anyway.
I would not do it myself, but I can see why some do it, will give you much time on type, and doing the calculations on their 500 hrs + 12 month contract, it works out economical way to get in to the Jet.