I agree that smileboxes are complicated, and I'd prefer to post pictures over a smilebox, but it did make me want to learn how to do it. I think smileboxes are seen as an unwritten rule, I'd be totally ok with making it clear that posting pictures are well within the rules, and Smileboxes are not a requirement.
Posting a series of pictures with captions is very personable 
and I think it's still an appropriate way to say thanks.
I hear smileboxes and money being the biggest reasons people don't join. I do feel maybe as far as money goes it's gotten a little out of hand. I scaled back by last GE box some and may scale back this time too. But I've seen in past GE's very creative inexpensive ways to surprise your buddy and have fun at the same time. It inspires me to be more creative too. I've seen post cards sent from different parts of the US/World for one...very creative and only requires a stamp (and getting the people to help you out). Teasers are also not required, but as mentioned above there are many ways to tease your buddy without spending a lot of money. And I have seen many GE's where a buddy chose not to send a teaser and have had GE's where I did not receive a teaser and I'm fine by that. If you are judging wether or not to join by watching smileboxes.....don't. No two buddies are ever the same and what you would do is different than what others do and is mostly about what your buddy puts on their sign up sheet.
I do like the idea of requesting a minimum of 5 clues posted at anytime throughout the GE. If you don't have time to follow other clue threads, that's fine, but if you at least post 5 it helps others who do like to seek out their buddy.
I feel like I am rambling. I love getting a newbie in the GE. It is fun to captialize on their inexperience........just sayin....it's part of the fun! Experienced GE members make me think harder.
Maybe an ideas thread. To give new GE members some creative ideas on how to surprise their buddy that doesn't cost a lot of money. Sometimes, just the not knowing how it all works is what keeps people from joining.????