They are definitely making a move.
You don't issue Founders stock for no reason. And generally this is done to label those with F shares for notoriety.
Something bigger than usual for this company is headed in, I see this as a positive, they are either getting bought out, merging with a much larger company, or have struck some solid financial deal that will propel one or many of their objectives.
If they were going to abuse the ticker, company and C holders, they could have issued any other preferred if it was a payoff, or to be converted as soon as the terms suggest. F shares are more costly for one thing, so it only stands to reason something good is in the works here.
Of course this could simply mean they are taking on a new guy, or girl, issuing them E shares and protecting the core.
Disclaimer: Everything I post is opinion and is not to be taken as investment advice. You make your own decisions based on your own judgement. Do your own DD = 'Due Diligence' = Your trade, Your responsibility.