Yes i know those threads.
In some of it only is asked to do task (puzzles, stories...) in order to reduce the number of people who can join and increase the chance for the people that take the effort on solve the task. I don't see anything bad about these topics.

There is other post i don't like, so i don't participe. simple.

And about your last question. Is not possible because there is a rank system (contributor). Also, there are other options (group, whitelist, blacklist) that serve to treat ussers in diferent way. So if you want to treat everyone the same way, start removing this options. I'm not saying i want it to be removed (i'm agree with the options, but not the way sometimes are used).

I'm not english speaker, so it's difficult to say my ideas the way i want it to say, so maybe you wouldn't understand my point of view.

Yes, i know it is not available for all countries, and some have less offers than others. I only make about 10 points per day seeing videos.

Other way to get games is selling the cards on steam (there were a lot of free games with cards) and buy some cheap game. But many people prefer to sell the cards and buy games to themselves. So they are here only wanting to receive but not to give. And, i'm not saying that they should give a lot or 60$ games. There are a lot of cheap games in steam each week.

And there is the option of giveaway bundle games you get and don't like/enjoy.

So, this is why i think, any could give some games and most of my giveaways are lv1+.