https://www.fleetwoodtownfc.com/news/2018/october/blackpool-promotions-become-latest-club-partner/

It actually pleases me to see it as they obviously thought it wouldn't be worth approaching Blackpool in it's current state.

W‍ise advertising strategy. The negative effect of advertising with OFC could cause irreparable damage to their business. 

And, some of those local businesses will be passionate Blackpool fans and refuse to give Oyston a penny. They'd rather their money go to somewhere it will be put to good use, if they must advertise at a football club.