Thanks for the advice. I guess no shops is the way to go if I don't want peeps peeved because they are stuck in a mob trying to go nowhere.
Yeah, you seem to get less disappointment from having no gift shops than by having expensive ones. But I'd still reserve space for them, or build them and keep them closed, so you can get right to business once the balance tweaks start.
The problem is not ride popularity, for some rides the "I don't have enough money" is the first thought for the ride. When it's too scary, or something, that's easy to understand, of course, that should happen. For the coaster I mentioned above, watching people who bounce, the reason is, over and over, that they're broke.
You only see the peeps at the ride, and they only regret they're broke, if they've decided they want to use that ride in the first place. But they're not the real problem with that ride being deserted. The real problem is that peeps with money are deciding they don't want to go on that ride, so don't ever go near it, and thus you can't see them or read their thoughts, you just see an empty queue. I mean, the park is constantly getting an influx of new peeps with full wallets, and most of those already in the park aren't broke yet, so more peeps have money than don't. The ride is thus more a victim of peep decision-making than peep finances.
Here's an anecdote of my own.
I"m currently building a park that's really a sandbox test facility to learn about peep behavior, as well as practice building stuff for me. It currently has 5 coasters and multiple examples of all gift shop types. The park was (IIRC) built as a sequence of areas in the following order:
0. Hat shop near entrance
1. Spinner with like E5, F3, N2, plus balloon shop
2. Loony Turns with like E6, F4, N1, plus memento shop
3. Large wooden with E 7.3, F 4.8, N 0.8
4. Wendigo kiddie coaster (E 4ish , F 3ish, N < 1) plus 1 of each type of gift shop
5. Large hybrid (E 7.5, F 5, N 1) and car track ride (E 5.9, F 1, N 1)
Each area also has a couple of flat rides plus food, drink, restrooms, and ATM. All rides have 100% queue scenery and Very High track scenery. The hybrid and woody both have prestige well over 1000 and the small coasters over 500. Peeps are unanimous in saying they love my park, they don't want to leave, etc. Park entrance is $10 ($8 for families), priority passes work 90% of rides and cost $10, and all coasters and popular flat rides are $8-10. The track ride is $15 and the unpopular flat rides are $1.
The spinner and the Loony Turns have always been totally full since the moment they opened, regardless of what happened later. The woody was jammed to start with but became deserted when area #4 opened, and has remained so since. The Wendigo has been jammed since it opened and is both the most popular and most profitable ride in the park. This despite the huge clot of customers at the adjacent gift shops, and those shops also had no effect on the popularity of the spinner or Loony Turns. The car track is also doing quite well and the hybrid reasonably so. The more extreme flat rides are breaking even (Collider, Insanity, and a couple others) but the more sedate ones (carousel, magic twirl, aeronauts, etc.) are essentially deserted even after greatly increasing their sequences and cutting their prices to $1. Between building areas 4 and 5, I doubled the prices of all gifts, which only caused peeps to trek between equally expensive shops. It had no effect on the queues of any rides.
The hybrid is too scary for families and the woody nearly so. Thus they are essentially in direct competition for the same adult-teen customer base, and the hybrid is winning that handily. There simply aren't enough non-family peeps in the park to support both right now (there are about 5000 peeps in the park). This supports @kickfliip's observation that you need 5000 peeps to support 1 non-family coaster, especially if it has a high throughput due to multiple large trains.
The small coasters and the track ride however, attract lots of adults and teens besides just families. This is because of their low fear ratings. Quite a few adults and a surprising number of teens actually don't like "green" fear ratings. And these coasters remain quite busy even when the gift shops are totally jammed up with hundreds of peeps who aren't on any rides.
So what I'm saying is, you can't blame gift shops for taking business away from big, extreme-ish coasters. If all coasters cost about the same, you'd see folks regretting being broke at both the big and the little ones about equally. That's not what I see. I see big coasters going hungry because they serve niche markets, and that niche simply isn't big enough in your park right now.
But hey, the whole purpose of the park is to make peeps broke. Whether the peeps spend their money on hats or ride tickets, it still ends up in your bank account. The one thing you don't want is peeps going home with money still in their pockets. So, having broke peeps is a good thing, regardless of how it happens.