Helium? That's a new one to me. The He molecule is very small, aren't you concerned that it will find some way out sooner more than later? I would be interested in hearing of how this fix lasts. Hopefully, you sealing the contours, helped. I guess the question is are you sure that the ingress of moisture was stopped?
Lucky when you pushed gas in there, they didn't pop, very dangerous move. That's why the repair guys use liquids that absorb moisture and evaporate it. (preferably those that don't leave a residue that is noticable.)
IGU (insulated glass unit) replacements is big business. It will always be around, and should not feel threatened by the small guys trying to save windows. IGU manufactures all have slightly different methods of make their products. It does not need to be true that all manufactures fill the space with a gas that benefits the life and quality. Nor is it always true that they vacuum the space long enough to get all the moisture out of that “adiabatic” space. (Dead space, when heat does not enter or leave. New Oxford American Dictionary.)
Does the technique of venting work? Yes it works. Up to the point were the incoming moisture is less than that which can be vented. In short, if what you have is a fish tank and not a window it may not work. Also, I have seen many mentions of the calcification (which is a form of glass surface deterioration often due to a reaction of trapped moisture reacting with the sealant (sulfur compounds and various etchants), metal spacer, and the iron in the glass. The high temperature and multiple cycles will cause deposits to crystalize and etch with the glass).
Please keep in mind, that many start in the repair business hoping to make a good business and honest living. However, most times the larger name group is the one that takes the bulk of the profits.
There are still good honest repair persons out there. You should look for track records! Most that are still in the condensation removal business use it only as a complement to their replacement business.
They use “Vents not Valves” and if they fix it correctly the IGU will out last any new replacements. Which if you think about it, a new IGU is just like pressing a reset button for the next 5 + years. But if you fix it correctly your done for many years.
I will be fair to say we manufacture all sorts of small products and simple tools. Some which are used in this industry. We do not repair IGU’s
Questions are welcome