RE: Marketing Insight - Blob storage capacity requirement
Apologies somehow missed replying here.
The latest Azure storage pricing can be found here - https://azure.microsoft.com/en-us/pricing/details/storage/blobs/
Each telemetry log item in itself is quite small so you will have to do a little back of the envelope approximation to get an approximate idea.
For e.g. if you are primarily using Emails
You could approximate all activities related to each email sent could be about 5kb (I am overestimating a bit here - to account for all events like open, link clicked bounced etc.)
If you were to send say 10,000 email per day = 10k * 5kb ~ 50MB/day
If you do that for 30 days - 50MB * 30 ~ 1.5GB/month
This should give you an approximate idea of how your storage will grow over time.
In addition to Emails the other types of telemetry to consider are if you are collecting Form data or Website visit data.
You can use the same type of calculation but have a smaller estimate per form submission or per page visit around ~1k for each.
Hope that helps.