Ptc sites with other features than just clicking - good or bad?

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I have noticed that many ptc sites are now getting more diverse. They are offering simple games like flip a coin and lotteries and renting referrals and selling things that has to do with their sites. They have advertising packages etc. I think the diversity is a way for the ptc sites to make themselves being noted among the many number of the similar ptc sites that pops up everyday. In my personal point of view I think that the more diverse a site is, the better. The more time and effort that the admin put on improving the site, the more trust I put in the site as being reliable. On the other hand sometimes I feel that the focus on improving the site, giving the users games and other "funny" tools, does not necessarily help the site. Of course they might get more users, that thinks it is fun with lotteries etc, but isn't it the advertisers they want? Sometimes I think that the sites should focus more on the advertising site, because only if they get advertisers can they keep paying its clicking members! So from a clickers perspective I think the diversity of the sites are good, it makes them more interesting, but I don't think it necessarily means that the sites are economically viable! What do you think, should the ptc sites focus on ads and clicks or should they wonder into games and lotteries to amuse their clickers?