Exhibit 99.30 MBNA MASTER CREDIT CARD TRUST II SERIES 1998-C KEY PERFORMANCE FACTORS April 30, 2000 Expected B Maturity 6/16/03 Blended Coupon 6.2333% Excess Protection Level 3 Month Average 5.92% April, 2000 5.53% March, 2000 6.02% February, 2000 6.23% Cash Yield18.08% Investor Charge Offs 4.70% Base Rate 7.85% Over 30 Day Delinquency 4.72% Seller's Interest10.74% Total Payment Rate13.82% Total Principal Balance$52,271,464,953.72 Investor Participation Amount$750,000,000.00 Seller Participation Amount$5,612,664,435.23