So here's my 2 cents: I do not appreciate tag bombing - ppl can do what they want but I never believed in that either to draw readers or earn that way - it is just how I feel and I ask to be removed if I don't want to be included
On the other hand subscribers are very very important as you mentioned - I have built mine slowly but steadily over 2 years both here and on another platform I write on - the first rule is not to annoy them by bombarding them with content - the second is provide good content - I don't subscribe to a lot because I make it a point to read whomever I subscribe to (along with some others) - because I truly appreciate/and want to read what they write