We’re only offering B Investment shares in this round and these would be available to all existing shareholders equally regardless of previous investments.
Having a large number of A shares carry an extra administrative / corporate governance burden with respect to voting matters (we’re not keen to run Freetrade like a public company yet!). There are also restrictions placed on A shares by our Articles preventing transfers or sales, so B shares offer more flexibility for shareholders to do as they see fit without requiring rather onerous procedures for the company to facilitate.