Yes, Dorna do support the teams financially providing they sign the riders they want to see in the series. If they have say a shortage of British talent, they can pressure a team to take a rider to boost TV ratings to keep the UK TV rights holder happy. BT in some ways have done Cal Crutchlow, Scott Redding and Bradley Smith a big favour by paying so much for the rights to screen in this country.
The hope for BT is that them being on top machinery will bring subscribers flocking in.

Bridgestone also provide free tyres for 22 of the riders. Any teams entering after that number have to find money for tyres also, a huge additional cost of entry.