Why not make events free? I doubt it would diminish the income HT gets but at the same time allows long time vets and such to pop in and relive some fun. I'd say it would be a win-win for everyone.
I wouldn't mind per se, but the two main events (FSO and Scenario) rely heavily on commitment numbers via squads (FSO) and registration (Scenario). Having these events free would allow anyone to join on any particular day. It would be a huge hassle for FSO squads to take in random people week to week, and those numbers can sway balance heavily. Ideally, they would work out evenly, but that doesn't always happen.
Scenarios are the same way - for example, our registraton numbers were ~45 v ~35 and in Frame 1 the event numbers were 65 to 50 or so. Not complaining, of course, but it was a bear to wrangle 35 walk-ons and get them squared away by launch time (which didn't happen, FWIW, we had to delay 10 mins).
In hindsight, I would not have minded trying to work with HT to have some promo weekends or something to coincide with this Scenario. 1-month trial, free SEA on Saturdays, etc. I have no idea how easy or difficult that would be, though.