I do not use trainer SW during the summer months. in fact today is the first day i've been on the trainer. i started using indivelo for the first time. so far so good. anyway, if you are inclined to use your trainer during the entire year then yearly subscription is very economical. for the off change that i need to use the traienr due to smoke or rain or what not then i've jumped onto RGT and now indivelo. i have my own SW to use also, not as nice but will work in a pinch.
regarding econimics...i don't like to subscribe to more than one of these platforms becasue of affordability. have been using rouvy but sort of miss the other riders that zwift has. zwift does monthly and that is what i had done in th epast. i generally go about 6-7 mos depending on weather. octobor 1 today, crappy weather but still not ready to give up on out door riding just yet.