Prospectus excerpt:  We are offering 4,000,000 shares of our 8.625% Series C Fixed-Rate Reset Cumulative Redeemable Preferred Stock, $0.001 par value per share, with a liquidation preference of $25.00 per share (the “Series C Preferred Stock”) by this prospectus supplement and the accompanying prospectus. Holders of the Series C Preferred Stock will be entitled to receive cumulative cash dividends based on the stated liquidation preference of $25.00 per share at a rate equal to (i) from and including the original issue date to, but excluding, April 30, 2028, 8.625% per annum (equivalent to $2.15625 per annum per share) and (ii) from and including April 30, 2028, during each Reset Period (as defined herein), the five-year treasury rate as of the most recent reset dividend determination date (as described elsewhere in this prospectus supplement) plus 5.13% per annum. Dividends will be payable quarterly in arrears on or about the 30th day of January, April, July and October of each year, when and as declared, beginning on April 30, 2023 (short first Dividend Period (as defined herein)). Dividends will accumulate and be cumulative from, and including, the original issue date of the Series C Preferred Stock.