Well, well, well. It’s time to bust the dilution myth once again! I see you’ve all jumped squarely on the band wagon.
You can have an overview here, or just jump straight to the handy spreadsheet at the bottom of this post, which lays things out inescapably.
I know it’s quite counter-intuitive, but if you look at the numbers you’ll see that there really is no such thing for crowd-funders as dilution. It’s not a meaningful thing.
Regarding the, er, actual topic issue, I’m on @from’s side. But NOT for reasons of “dilution”. It’s just a nice courtesy to be asked to participate in future rounds. On the upside, if they invested more in the first round, then this round is, proportionally, not really much to miss.