It all depends on where you live, because if you are in a place that has banned Cryptocurrency or Bitcoin you will never be able to find a Bitcoin ATM, but if you are in a country that has legalized Bitcoin, you will definitely find more Bitcon ATMs. there and it is very easy for you to make transactions with a Bitcoin ATM.
No, it doesn't depend on that, there are tens of countries with favorable laws and barely a few Batms.
If you would have actually taken a look where those BATMs are located by the country you will see different numbers that make no sense based on any pop/income statistics and all the while in countries with nearly the same laws.
For example, Austria has 149 while France 9, is bitcoin banned in France?
No, all that matters is the market, if people use them and the operators get profit from them they will install more if the business is dead and people are choosing another method of buying/liquidating no law will manage to bring you, clients. It's the market that dictates this and the money that people have, you can have a country with 100 million population, but if everyone is dirt poor no matter what laws you pass they will never be able to buy, especially if only the tx is worth a daily wage there.
"7.5%? I would never exchange a penny." - Thanks, also good to know and why we are still researching (it's been hard to get real-world user/owner feedback)... 7.5% is just a jumping in point based on being lower than any other BATM market but obviously better to know what users are really willing to pay.
Maybe in your country, that's why it is so hard to make an estimation
For example:
https://coinatmradar.com/city/296/bitcoin-atm-valencia/Buy: 5.3%
Sell: 2.6%
7.5% might sound lower than probably half of the BATMs in the US but it's highly likely is higher than almost all around here