Ad free for more than one month

Hey there!
I think it would be a good improvement to have the possibilty to buy adfree profiles for more than only one month (as you can do it now).

A possibilty would be to group it like the VIP, so make it able to buy adfree for 1 month, 6 months, and maybe even a year. That would make it a lot easier than having to buy adfree 12 times in a row :b

Thanks!