Platforms that connect people looking for a service/good and companies/individuals providing them can be great. However, since there are always more users than suppliers, these platforms tend to favor the customers.
On AirBnB, a common practice is for a guest to make up an excuse to complain about a place AFTER checkout. Usually they make up something hard to prove, such as "there was no water/internet" or "the was a bad smell" or "I saw a spider in a corner". The platform reimburses their stay in full, leaving the unit's owner with utilities bills, cleaning fees, and property taxes to pay.
On PayPal, a buyer can open a dispute to get a refund AFTER receiving a service/product.
In both scenarios, the seller/provider/tenant can challenge the dispute and has to spend time documenting their reasons. But they know the chances of seeing the money/payment reinstated are slim. In part, because we know that they favor the customers, in part because they don't really have a full picture/knowledge of the issue, in part for the limited characters one can type to explain themselves.
I have been looking for tenants outside of AirBnB for that very reason, but I am currently victim of a PayPal dispute from a client who received her documents and at the same time is challening me that the product was not as described. Since she bought digital products (a document and its apostille, from Argentina, with digital signatures and verifiable online), I delivered again the products through Paypal. She keeps disputing that they are not as promised. I don't know what is not as promised. Maybe she just changed her mind, or she genuinely doesn't understand what she had ordered and received. Either way, not only I have spent money to request these documents to the public offices that issue them, but I am now spending time to try to get paid. More time wasted and I can't see the light at the end of the tunnel.
I had a bad experience in the past on PayPal when I sold a brand new Gucci product to a person in Canada through eBay. They sent the payment through PayPal, I shipped the product oversea and after 40 days I saw the money disappear from my PayPal account. The reason? It seems that person used a stolen credit card. I got the short stick in the story, since the owner of the stolen credit card got their money, PayPal didn't lose any money, but I lost my product.