Does Robosats only works in Tor only or works in any Clearnet browser that does not require connection to the Tor network 1st and if so there is no limited functionality on the Clearnet version in compared to its Tor version?
Yes, RoboSats only works in Tor if you want any privacy. Technically you can use it without but if it's on clearnet, your IP can see all of your traffic.
In my experience, they are about 5-7% but if you're patient, you can buy at 0% premium.
There's very low liquidity on the RB order book so you're best bet is to break it up into smaller payments of around $100-$500
RoboSats supports any form of payment method that you want. The other party just has to accept the payment method. If you want to pay with Euros via SEPA, then the seller has to acccept that as a form of payment. If you want to pay with Pokemon Cards by mail, the seller has to accept that as payment.
There's no chargebacks with stablecoins because it's "crypto". When the seller sends you an address, you send the stablecoins to that address and they release the bitcoin payment. There's little to no risk of fraud because the address that you send payment to us in the chat and you can easily prove that you sent to the address if you can provide the TXID that you used to make the payment and maybe a screenshot of the payment in your wallet.