Getting ad for 'Block Fi' when backing out of web site. Ok after closing Brave

When I back out of a website to the Brave homepage, an ad for ‘BLOCK FI’ appears in the lower left corner of the home page. If I close the browser, the ad is gone.

Windows 7

Some information about the Sponsored Images from BlockFi posted by Brave:

…along with some other helpful information posted here a few days ago:

Turning sponsored image off solved the problem. Thanks for quick reply.