No Option to change billing period????

Squarespace commerce doesn't seem to have the option to allow customers to select a billing period (example: if my product is a subscription for service, you'd have the option to do 9.99/mo or 59.99/year) 

What a simple and necessary option to include. It's a headache to now have to put two different products for two different billing cycles.

Anyone know any workarounds?

There also isn't an option to have price addons. What if my product/service has optional addons that you can select multiple of? I have to have 20 different price variants to cover all of the different combinations. This commerce system is absolutely terrible