YES
NO
NO
NO
NO
YES
NO
Then you can't use the TgScanRobot
It works. It just does not display information until you top up your credits balance on tgdev.io website
The bot became paid. Every request you send to robot must be paid with credits. You purchase a number of credits and then you can spent them on requests to TgScanRobot.
The price for 1 credit is 0.01 USD
The minimal amount of credits to purchase is 200 credits i.e. 2 USD.
At the current time it is not possible. In the future -- maybe. There is no specific date when it will be possible.
NO
You can send free search query to TgScanRobot and check number of groups it knows for the person you search. Based on number of groups you can decide do you want or not to purchase paid access to TgScanRobot.
I am looking into to do legit business and provide quality service. Both things require money and time spendings. In return for my services I do not expect you pay me time, but I expect you pay me money.
Please read this document about payment troubleshooting tgdev.io/doc/payment-issues
Send @username or numeric Telegram ID of a person to the bot. The bot will return you a list of groups which this person is member of.
Also you can forward a message from that person to the bot. The forwarding method does not always work because a person might configure Telegram to not allow other people and services to extract person's ID from the message which he/she has written.