Regarding tourist visas:
I’ve seen this topic come up, but nobody provides sources for their answers. There are a lot of conflicting opinions from people.

What is the official rule on how many times someone can get a tourist visa? Is there a limit?
I found this source that says entry into the country BY AIR is unlimited, but it’s a “.com” website, not official government site.
Does anyone have a better source for answers?
TLDR : Answer Summary
The official rules on obtaining a tourist visa for Thailand indicate that there is no set limit on how many times you can receive a tourist visa in a year, as long as an embassy continues to grant them. Tourist visas last for 60 days and can often be extended for another 30 days. However, entry into Thailand is ultimately at the discretion of the immigration officer at the time of arrival. It's important to distinguish between tourist visas and visa-exempt entries, as the latter has specific rules that limit entries at land borders to twice a year, while there are no such limitations for air entries. Many users advise checking credible sources, such as the Ministry of Foreign Affairs or the Immigration Bureau, and also recommend direct contact with the Thai embassy for accurate information.