Is the Kota Bharu Thai Consulate currently issuing Non-Immigrant B visas for multiple entries?

Also a for a shareholder - Farang or Thai - he or she does not automatically become a Director. A Director has to be appointed by a majority percent shareholders. A Director is the only shareholder who can make decisions - sign contracts, make tax filings, sign financial reports or create bank accounts, etc. In my opinion I do see any Company assigning a 20% shareholder as a Director.

The terminology used is 'share holder' / shares. Starting with the fact that most Thai Registered Companies (Co.,LTD.) have one - usually two Thai partners who are designated in the Company Certificate as owning 51% of the shares. That leaves 49% to divide up. Plus it most often means 2 to 4 additional Thai employees for every additional foreign share holder. This may not apply to BOI companies.

You either are a managing director OR you hold 20% or more stock in the company you work for. If you don't meet either of those criteria all you get is a 90 day single entry Non-B

Yes. I had one multiple b visa and two multiple o visas issued there in beginning of April but I do have more than 20 % ownership of the company.