There are some trademark jurisdictions that (1) accept only single class applications; (2) require legalized documents; and (3) are not particularly large markets. As a result, the cost of obtaining trademark protection will be fairly high in relation to the anticipated revenue from that jurisdiction. Are there any heuristics out there with regard to the relation between trademark cost and expected revenue with regard to that trademark (as in, a rule of thumb that the cost of trademark protection ought not exceed X% of the revenue in that country?) p.s. I appreciate that certain countries are viewed as havens for counterfeiting, and a trademark owner may wish to obtain protection there even if it doesn’t do business there.