Why not this.

[Nabiri]

That doesn't sound like your confused, but rather that you just don't like the idea. I don't suggest things so concretely, it's a reduction in the number of times you can enter in a period of time, rather than enter every 15 mins.

It doesn't sound like anything because you can't hear a tone of voice when reading something over the internet.
But I assure you that I'm a very straightforward person, and I wasn't quite sure what your idea was... that is why I asked. Something about the way the OP was worded just confused me. I apologize if English is not your first language or something. The short broken sentences and then the run-on ones threw me off. So thank you for clarifying. As I said, as long as I can do something a few times a day I'm happy. If it's reduced a little I wouldn't mind. But I think it would be easier for me to find members if it was more than once a day.

A fixed number of times in a day/week/few days or what have you. You get 3 Ifrit entry tokens/day they can stack to 12, so if your going every day your limited to 3 runs a day, but if your only going every 2~4+ days you'd get 6~12 runs at him. Seperate entry tokens for each "content" so in a single day you could do 3 Ifrit 3 Garuda 3 Moogle 3 AV 3 CC 3 DH, if that's not enough to fill your day you need to start sleeping.

Universal tokens on the other hand you'd get maybe 8/day stacking to 24, everyday you can do 8 of w/e you want at w/e times you want, 8 Ifrits, 8 Garudas, or 8 AV. Or you can mix n match, do Ifrit 5 times you've still got 3 for something else.

Not unlike anima.

The rest here, while interesting, I personally couldn't care less about drop rates and such. I figure "I'll get it eventually, I don't need it right now." I'm more about the journey(just enjoying myself with people) than the destination(rewards), and I'm probably masochistically patient, lol. So, I mean, I wouldn't care if they kept the same crappy drop-rates they have now. But I wouldn't mind them being a little better either. :x Meh~
But again, thanks for clarifying.