It's a marketing gimmick. I think the reason why they continue pumping these "interest" schemes is because people will buy their books and it makes them a fortune. Options trading is very speculative, thus people assume that the 25-30% return is real and not just a nominal number. For example, if you wrote puts, you could recoup 2.5% per month from the premium of the option (until your option is exercised). However, you have all of the downside risk and none of the nice upside surprise so you are at risk of the market rising too much or falling below the exercise price. People are looking for a quick buck and cannot stand to have to earn it, over time. I like options trading for the potential of a 25 or 30% annualized return from writing options, but I also give up all the upside for all of the downside risk. If I utilized options trading strategies, I would only want it to be 5-10% of my total portfolio due to the high risk involved in speculating in options. I think options used as a hedge (buying puts to secure a long position or buying calls to secure a short position) has merit.
I think it is because people don't read or don't understand what they read. Unless you can understand the ramifications of investing in options (that money can quickly evaporate in an instant and that you lose your entire investment if you buy call options that stay the same rather than having to go to zero like individual stocks), than you shouldn't invest in them.

Prudence, not stupidity should be the lesson here.