Have encryption viruses appeared that cannot be decrypted in principle?

Question

Malware

Is the information true :
"the transfer of funds to attackers is not a guarantee that the databases will be decrypted. A copy of the malicious software used to encrypt databases does not always include the ability to decrypt in principle"
That is, the situation has changed radically - files are not encrypted , but they stupidly damage, extort money, and "throw" suckers who did pay this money?

Answer 1

Yes

Answer 2

For encryption, quite normal programs are used, for example, pgp, but usually they use rar, which simply packs files into an archive with a long password. The file with the password is closed on the public key. Actually everything.
It's just archiving.