Errand Boy is an exciting piece of ICE, imo. Currently there are only 3 pieces of ICE that give the Corp credits (Pop-Up, Caduc, Shadow). Errand Boy adds the option of gaining cards instead of clicks.
Mathematically, it seems to be a strong piece of ICE.
Assuming it is not broken upon first encounter, it gives the Corp an entire turn worth of tempo, 3 clicks.
Taxing, with 3 subroutines. I imagine Runner behavior vs. this card will either be to break all the subs, or none.
The card has some immediately apparent weaknesses:
Vulnerability to parasite; however, plenty of other strong decks run cards that are vulnerable to Parasite. Pop-Up is a staple of NEH and many others; Pup is the core of PE; Komainu/Tsurugi are the cores of RP.
4 to rez; expensive for 1 strength.
At 1 influence, I think this deck is theoretically appealing to many Identities. an obvious synergy IMO is with Midseasons. You need the Runner to steal, so the porosity isn't an issue. moreover, it can help you dig for a Midseasons, or credit up to pump the Midseasons even further. I think it may be easier to stomach splashing these into NBN at 1-each than Midseasons into Weyland or CB at 5-each.
for the same reason, the upcoming Argus Security might like this card, as stealing agendas taxes the runner.
What are some more thoughts on lil Errand Boy? Here is a Christmas jingle for my new favorite piece of ICE
Come, little Runner, pa rumpa card cred
Free data here for you, pa rumpa card cred
I have some work to do, pa rumpa card cred
To grease the Corporate gears, pa rumpa card cred
rumpa card cred, rumpa card cred