I am not a native speaker of English. So my answer may not be accurate. So far as I am concerned: "Because of " implies you're telling others a reason that they don't know. "Owing to" implies a fact that has happened. "Due to" implies one thing caused by another. "Thanks to" implies a lucky or good thing caused by another. If " thanks to " was utilized to put an unlucky or bad thing, it must have a satirical connotation in my opinion. By the way, It seems grammatically incorrect to place "owing to" behind a verb directly while the others are all acceptable and allowable.

While "because of," "owing to," "due to," and "thanks to" are often used interchangeably to indicate the cause or reason for something, there are subtle differences in their usage and connotations. "Because of": Neutral connotation: It is a straightforward and commonly used phrase to indicate the reason for an action or outcome. Example: The game was canceled because of the rain. "Owing to": Formal and somewhat more literary: "Owing to" is considered a bit more formal and is often used in written or formal contexts. Example: The delay in the project was owing to unforeseen circumstances. "Due to": Formal and often used in a technical or cause-and-effect context: "Due to" is similar to "owing to" but is also commonly used to express a consequence or result. Example: The flight was delayed due to technical issues. "Thanks to": Positive connotation: This phrase is generally used when expressing gratitude for a positive outcome or situation. Example: Thanks to the generous donations, the charity was able to reach its fundraising goal. While these distinctions exist, it's important to note that in everyday usage, people often use these phrases interchangeably without a significant difference in meaning. The choice between them can depend on the context, formality, or personal preference.

because of/owing to/due to - based on circumstances because of/owing to/due to the rain, the parade was canceled. thanks to - intentional thanks to their generous donation, we were able to build the new center.

"Because" is logically pure. For example, if x is an even number and y is odd, a mathematician would say "x+y is odd because one of the numbers is odd and the other is even". A mathematician would be unlikely to use the other words because they refer to human circumstances: owing and thanking, and there is nothing human about x and y. "Thanks" implies gratitude. It has the ability to be positive, but is not always so. For example, you could say "the picnic will take place today thanks to the good weather". It can also be negative: "the meal was bad thanks to the terrible chef". The two examples have something important in common: in both cases "thanks" expresses emotion (positive or negative), whereas "because" does not. "Owing and due to" do not explicitly express emotion. Like "because", they make a connection between cause and effect but the connection lacks the logical firmness of "because". For example, you would say "due to our busy schedules, we will not play tennis today". The connection between our schedules and tennis lacks precision. It is a casual relation, not causal, scientific or absolute.

I think this is a very good question. Probably there is a more negative connotation to the use of "owing to" and "due to". And a more positive link to "thanks to". That's my opinion and I don't have any in-depth statistical analysis on which to base this! I just think it is more likely that people would choose to use "thanks to" when there is something good to be thankful for, and that because we use "owe" and "due" to talk about money that we must pay whether we like it or not it has a sort of negative vibe. However, I am sure there are many examples of people not following this "rule" that I have just invented! :-) I think it is also probably true that "because of" is the least formal of these synonyms, so that might be a factor in which one is chosen.