Some of these talks are based on their success stories on what
they do to achieve today.
Some of these have preview which you can attend which is free and
the presenter will have some know-how which you will be
encouraged to attend the
full seminar/training program/talks, as i do not wanna use the word
'tempt'.
Actually, most of the background is mostly 'sales directly or
indirectly related', like franchise system, investments
(shares,blue chips,IPO), MLM, insurance, property, direct selling,
personal finance management, etc....
You choose for yourself, go attend the free preview to give
yourself some exposure to such events. Do not be shy to reject any
hard-selling. 
Have fun there.