I believe Trump’s team is just being shrewd here. They are saving up money for a kick in the last three weeks of the race. By that time they will have a better idea where to target ads most effectively. I also believe the poster who mentioned he could go on FOX News any time he wants between now and then but his internal polling will help him hyper focus advertising on the markets (or perhaps even districts) which will do him the most good
As long as he is within striking distance very shortly before election day (and yes, many of us will have voted by then) he can really leverage spending by letting the numbers direct his strategy. Remember, like all con men he will use information the mark (or undecided voter) doesn’t know he has access to.
Also I, as well as several family members are receiving multiple contacts a day from the Trump campaign. They are usually poised as opinion polls or issue priority calls/texts/mailings/etc., but they are all solicitations for money and offers to arrange for a mail-in ballot. They are pretty desperate if they are targeting me!
(Funny how Trump is always questioning mail-in voting but making intense and repeated efforts to get those same ballots into registered R hands. I just hope my fellow Republicans can see through him as well as I can.)