Mathematically unlikely, RNG possible over a couple of games.
More to the point, if your bands are making 30,000 tourism per concert you already have won.
Are you sure you did not mean 3000-5000 output per turn
Sure 100% agree, just saying that getting 30% to that level would have created a lot of tourism. A hell of a lot, taking roughly 20 domestic tourists into foreign per concert.
For relevance to the OP then a 30k tourism boost allows you to go quite late into a CV but 30% of your bands is exceeding the curve somewhat so do not expect to get that many every game.
A nice calculation challenge for the maths whizzes out there as to the probability of this.
I like math! According to our understandings from the other thread, the cumulative lifetime odds of getting any +2 band to level 4 ought to be
9.4006%. Worth noting that the first level up is half the battle, and it's easy from there.
This number does not match my experience, though I have no mechanical explaination as for why my rolls should be different--just the anecdotes of my dozen games. No mods.
Since my last post, I played a chopless Large Immortal game. I could afford 8 bands, of which the first 5 died instantly and the last 3 survived to level 4. (So 3/8) Right after I won, I hit one more turn so I could grab a screenshot:
(As you can see/guess, this particular CV went long because it was against Greece.)
It is entirely possible that I have just gotten consistently lucky, but this
has been my experience across about 12 RS games involving bands.
Edit: Small amount of bonus math for fun--the
expected (average) cumulative lifetime Tourism of a Level 4 Album Cover Rock Band (with the
minimum amount of pre-level-4 sales) is a whopping
696,415 Tourism. This series calculation excludes the final performance, and of course is the raw value before Goes To 11.
Realistically, you will run out of turns/Wonders before the tail of this is realized (even if you wouldn't have won the game only a short way into this), but it is still very illustrative of the state of affairs.
Edit 2: Given the nature of the victory condition, this chart might be more helpful:
This chart is Album Cover level 4 performance cumulative-survival performance, and ignores pre-level-4 record sales. It also assumes record sale performance and tourism bomb performance are independent, which is an incorrect simplification but one that shouldn't affect the results much. (It causes the data shown to be very slightly under the real results.)
Due to the way the math works, you can also read this as a very close approximation for the full lifetime results of any band that does make it to level 4. (So, a Album Cover band that makes it to level 4 will by turn 12 have produced a lifetime average close to 114.8k)