Private Tab with Tor: "normal" websites "Access Denied"

using Version 0.67.125 Chromium: 76.0.3809.100 (Official Build) (64-bit) on thinkpad laptop, accessing Private Tab with Tor, no settings changes, accessing google.com produced a challenge “unusually high traffic”, but got around by Captcha, but trying to access ordinary things, in first case bestbuy.com produces a reject “Access Denied”. I searched through recent posts here and see nothing on this issue.
it is also VERY slow using this option - My link is full 200mbps verified… but my wifi slows that down to about 140

any suggestions other than “don’t use it”?
thank you
cognus

@Cognus maybe this one can help answer your questions https://support.brave.com/hc/en-us/articles/360018121491-What-is-a-Private-Window-with-Tor-