Quick question about affiliate marketing

In a way i understand, in our case, our service could cost anywhere from 50 USD to 30 000 USD, that is for one time, same client is usually a returning client, don't have to do any work after the initial contact, but keep getting paid for it as long as the client gives us projects.
So in a way, i see bigger money to be made in services, not necessarry ours, but services in general.

Yep, could pull out the stats easy, since there is only few people doing it locally, the amounts aren't as high as they could be, obviously each month is different, but since my friend is doing it, i know how much he puts into it, for the last 3 months, no work put in, but i still pay him, since the clients keep coming back.
As for earning per click, well clicks are really not all the important if they do not convert, as per client, it is different in each case, clients are different, an individual could spent 50 euros getting one project done, where as a company could have their website, manuals, conversations and etc. translated which could up to a large amounts, such as 100 000 USD or well over, i mean this there are around 336 billions Euro spent on translation globlaly each year, quite a lot of money to be made there.
For an large translation agency, i came to find out that affiliate makes well over 200 000 USD per year, she does not have to put any work anymore, she referred clients to this agency and they pay her for as long as the referred clients keep ordering projects.