I accidently joined a Limit MTT before, buy in was $5 and top 8 got free entry into the 25K on Sundays at Empire.
I actually did quite well, finished final table and I wished I had finished 10 or 9th so I coulda gotten some cash instead of the $110 buy in. Needless to say there was no reason to stick around at the final table when the first 8 pay the same amount.
I think I finished 90th out of 250 at the next tournament.