These days, matt, the oportunities would be few and far between. I remember the word being used fairly frequently in days gone by - mainly to do with Olympic Games competitors and Rugby Union players in the days when all participants were supposed to be amateurs. Whilst the meaning of the word is pretty much obvious, as is its etymology, I'm not sure when it was coined. One source (Allwords.com) indicates the late 19C. The dictionary I have here in the workshop (Penguin) is of no assistance.

"The first use of the actual term shamateur recorded in the OED dates from 1896 when the Badminton Magazine declared `For frank and open professionalism there may be a good deal to be said, but nothing can make ... the "shamateur" attractive.'" (from http://www2.umist.ac.uk/sport/Sports%20History/Birley.html)
Sorry, sometimes a wee bit of trivia worries away at me. I'll shut up now.