I disagree...
One of the main reasons why I subscribed (at least initially) was to participate in tournaments (Clans weren't that interesting whilst being a non-subscriber). If you open tournaments to non-subscribers then these will never sign up ... Especially if these tournaments are big tournaments where good players are likely to at least get into a second, possible third round ... By that time, the next non-subscriber tournament is open and here we go... Having a non-subscriber reaping the same benefits as subribers ...
Don't get me wrong Russ, this is just my own personal point of view and I would be more then happy to play along in tournaments with non-subscribers but from a business point of view, me in your position, I wouldn't do it.
Regards
The Paying Pawn 😉
Have you concidered the turnover of people at the site? I'd say that if 1 in 4 people who come to the site are still here 6 months later then that would be a lot, but even if that were the case you'd have a 1 in 16 chance that both players were around to finish the tourney match. HOw can atourney worrk when 15/16 matches are won by T/O because one player has left. And worse, 1/4 of the matches would be drawn because both player would have left and neither made a move.
To run a tourney you need people who are going to stick around for a while. Subscribing is th eonly way I can think of signifying that you probably will be. It'd not be much of an advert for the site for newbies to try to enter a tourneythat just fell apart.
disclaimer - it's monday morning & I've a headache, so if my maths is wrong feel free to correct me but go easy on me.
if it was a rare tournament, but large enough to let all the contenders have a go, then it would not be enough to keep the genuine players fully satisfied for long - they would still want to subscribe.
lets say it was a 3 round tournament group size 6 (6x6x6 = 216 players) then the first round would be dominated by timeouts; the second and third rounds would be good games.
choosing the time limits would be critical.
p.s. i am just tossing ideas out there - i am not all that familiar with the issues involved here.