Playing against a Shaper (Kit) deck, I had a situation where the Runner encountered my Tollbooth with zero credit in their pool. They did have 2 credits on a Ghost Runner and also had a Cloak (with its recuring credit unused this turn), a Refractor and a Net Mercur (with no credits on it) installed:
My question is, when this Runner encounters Tollbooth in this situation, to what extent are they forced to take actions which make credits available in order to pay the 3 credits required by the Tollbooth?
Must the Runner spend credits from a Ghost Runner if they are available? I believe the answer to this is yes, but some confirmation with reference to the appropriate rule(s) would be helpful.
More interestingly, is the Runner in this situation obliged to use their Cloak to take some action (i.e. using the Cloak credit to invoke one of the abilities on the Refractor, say the +3 strength) which will result in the Net Mercur gaining a credit, which in turn can be used to pay for the Tollbooth's encounter action?
Or does the Tollbooth only force the Runner to spend credits which are directly available without any other actions taking place first (and must they only come from the credit pool)?