The advantage for you is client loyalty1,' Mark replied.
'When a client's licence period ends, they won't have to buy new software, they'll just have to buy a new licence. That will
be much cheaper, so the client will want to go on using your
product, rather than buying another company's software. So the
client gets regular updates, and you get loyalty. And when you
do produce a completely new product, you can sell it to your
existing clients at a discount. It's good for both of you