If someone mentions that "With crypto you will have no options to get back your money if the service advertised does not match what you got". That is not true. If the service advertised does not match what you got AND the seller is willing to refund, then EVEN WITH crypto, ofcourse you can get your money back. What you cannot do with crypto, is a chargeback. People often (even nowadays) confuse a chargeback with a refund.
Paypal nowadays considers proxies as high-risk item (product). Paypal's T&Cs mentions that it prohibits using Paypal for "items that facilitate to engage in illegal activity". Though not every proxy user is engaged in illegal activity, lately there has been an increase of online illegal activities and such scammers often use proxies and it is due to this that Paypal nowadays considers proxies as a high-risk item (product) which is prone to be used for engaging in illegal activity.
Another trend nowadays is that if a buyer buys any product (item) using Paypal, which as per Paypal's T&Cs is a prohibited product (item), then nowadays Paypal can suspend the Paypal accounts of even the buyers (not only the sellers).
For proxies, SMM services, etc, nowadays, it is safer to use crypto for payments. As a buyer, why risk your Paypal account ?
Buy from a reputable proxy provider who has a decent refund policy and then if incase the proxies you buy do not work as advertised, then you can get a refund even if you paid using crypto (referring to reputable proxy providers who has decent refund policies).
It is nice to see people mentioning to prefer crypto instead of Paypal (for proxies, SMM services, etc). I remember the days (upto a year ago), whenever I mentioned that paying with crypto is better than paying with Paypal, for proxies, SMM services, etc, I used to get badly beaten up. At that time, I used to wonder why people are not realizing the direction in which Paypal was (is) moving. Anyways, it is better late than never and I am glad to see more and more people waking up to the reality. (I guess "https://www.collinsdictionary.com/dictionary/english/once-bitten-twice-shy" is true).