Other trivial reasons for conversion to Islam include…
http://www.nytimes.com/2001/10/22/national/22CONV.html
including:-
…asked for a sign, saw a registration plate. Priceless!
…fancied someone and converted so as to match
…influenced by friends at college (still impressionable at 18-21?)
So there seems to be very little research prior to these conversions. They're after new friends and/or a love life. I'm sure their new God will be flattered by their actual inner motivations.
(found that link, posted by Keyplus, on one of the related threads, below).