I agree that premium accounts are not the way top go. If people don't want add just use adblock. If you feel you should compensate ioi and help the site donate.
T-Shirts and other crappy awesome merchandise not only will help support the site but is very common on free sites. It is not intrusive or a turnoff like premium accounts. Also it helps spread the word and increased visitors which is really the best way to support the site.
Final* Word on Game Delays:
The game will not be any better or include more content then planned. Any commnets that say so are just PR hogwash to make you feel better for having to wait.
Delays are due to lack of proper resources, skill, or adequate planning by the developer.
Do be thankful that they have enough respect for you to delay the game and maintain its intended level of quality.
*naznatips is exempt
