Quoting the blog post
For our existing subscribers, we are introducing the Grandfather Clause, where if you are an existing subscriber on SoStronk on the 1st of August, your subscription rate will remain the same for a year i.e. until 1st August 2018.
We also postponed the date to 8th of August. So if you were an existing subscriber on the 8th of August, your subscription rates for the next one year will be the old rates.