Have I got this right if you pay for your premium membership upfront for the year you get an extra 4 months, so your renewal date is 16 months later?
No. If you pay up front, you get 12 months for the price of 8 months at the full monthly rate.
Well I can't figure that out, I have just taken out gold membership at a price of £24-99 for the year and by paying monthly it would cost £2-08 per month. Where is the advantage in paying yearly as it states on chess.com (Yearly 4 months off)
I think you are reading that wrong (and missing the asterisk) - 2.08 x 12 = the 24.99 and the asterisk next to the 2.08 refers to the price per month (based on 12 months) if you pay for a year.
Right above the box for the Gold there are the words "Monthly" and "Yearly (4 months off)". Click on "Monthly" and the prices change.
Yes.
The monthly rate in pounds is £3.67.
Have I got this right if you pay for your premium membership upfront for the year you get an extra 4 months, so your renewal date is 16 months later?