I chose the e-mail format to make sure that I don't lose any lesson. E-mail forces you to act on it: either read it or delete it. I made a weekly newsletter so people don't get drown in e-mails.
But I totally get your point, I will think about a way of solving this issue. Until then you can also subscribe via RSS to the e-mails:
https://us9.campaign-archive.com/feed?u=383e62709f4ac9e20d7d...