For simplicity, size is based only on the number of active ads. You pay only for the portion of your account you choose to link to Adalysis.
You can link as few as one campaign, a whole AdWords account or an entire MCC (in which case we count the total ads across all linked accounts).
To find out the number of active ads in your account(s), please proceed with the free trial sign-up. You will first be shown a full breakdown of your ads count before you decide to opt-in for the free trial.